Home / 14,139.50-21,209.26-4,278.56

Finding the Fourth Proportional to 14,139.50, 21,209.26 and 4,278.56

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Solution

The fourth proportional to 14,139.50, 21,209.26 and 4,278.56 is: 6,417.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.50 : 21,209.26 = 4,278.56 : x
  2. Step 2: Convert to fraction form
    14,139.50/21,209.26 = 4,278.56/x
  3. Step 3: Cross multiply
    14,139.50x = 21,209.26 × 4,278.56
  4. Step 4: Simplify right side
    14,139.50x = 90,745,091.47
  5. Step 5: Solve for x
    x = 90,745,091.47/14,139.50
  6. Step 6: Final answer
    x = 6,417.84

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Half scale
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Double scale
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Similar ratio
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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.