Home / 21,835.87-30,134.57-12,278.76

Finding the Fourth Proportional to 21,835.87, 30,134.57 and 12,278.76

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Solution

The fourth proportional to 21,835.87, 30,134.57 and 12,278.76 is: 16,945.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.87 : 30,134.57 = 12,278.76 : x
  2. Step 2: Convert to fraction form
    21,835.87/30,134.57 = 12,278.76/x
  3. Step 3: Cross multiply
    21,835.87x = 30,134.57 × 12,278.76
  4. Step 4: Simplify right side
    21,835.87x = 370,015,226.71
  5. Step 5: Solve for x
    x = 370,015,226.71/21,835.87
  6. Step 6: Final answer
    x = 16,945.29

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Find fourth proportional to 10,917.93, 15,067.28 and 6,139.38
Half scale
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Double scale
Find fourth proportional to 21,836.87, 30,135.95 and 12,279.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.