Home / 28,428.10-39,230.93-15,681.73

Finding the Fourth Proportional to 28,428.10, 39,230.93 and 15,681.73

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Solution

The fourth proportional to 28,428.10, 39,230.93 and 15,681.73 is: 21,640.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.10 : 39,230.93 = 15,681.73 : x
  2. Step 2: Convert to fraction form
    28,428.10/39,230.93 = 15,681.73/x
  3. Step 3: Cross multiply
    28,428.10x = 39,230.93 × 15,681.73
  4. Step 4: Simplify right side
    28,428.10x = 615,208,851.91
  5. Step 5: Solve for x
    x = 615,208,851.91/28,428.10
  6. Step 6: Final answer
    x = 21,640.87

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Similar ratio
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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.