Home / 28,240,646.28-38,970,863.46-15,680,918.76

Finding the Fourth Proportional to 28,240,646.28, 38,970,863.46 and 15,680,918.76

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Solution

The fourth proportional to 28,240,646.28, 38,970,863.46 and 15,680,918.76 is: 21,638,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240,646.28 : 38,970,863.46 = 15,680,918.76 : x
  2. Step 2: Convert to fraction form
    28,240,646.28/38,970,863.46 = 15,680,918.76/x
  3. Step 3: Cross multiply
    28,240,646.28x = 38,970,863.46 × 15,680,918.76
  4. Step 4: Simplify right side
    28,240,646.28x = 611,098,943,923,312.50
  5. Step 5: Solve for x
    x = 611,098,943,923,312.50/28,240,646.28
  6. Step 6: Final answer
    x = 21,638,985.80

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Double scale
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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.