Home / 21,314.98-31,972.58-5,518.90

Finding the Fourth Proportional to 21,314.98, 31,972.58 and 5,518.90

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Solution

The fourth proportional to 21,314.98, 31,972.58 and 5,518.90 is: 8,278.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.98 : 31,972.58 = 5,518.90 : x
  2. Step 2: Convert to fraction form
    21,314.98/31,972.58 = 5,518.90/x
  3. Step 3: Cross multiply
    21,314.98x = 31,972.58 × 5,518.90
  4. Step 4: Simplify right side
    21,314.98x = 176,453,471.76
  5. Step 5: Solve for x
    x = 176,453,471.76/21,314.98
  6. Step 6: Final answer
    x = 8,278.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.