Home / 28,427.10-39,229.55-15,680.73

Finding the Fourth Proportional to 28,427.10, 39,229.55 and 15,680.73

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Solution

The fourth proportional to 28,427.10, 39,229.55 and 15,680.73 is: 21,639.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.10 : 39,229.55 = 15,680.73 : x
  2. Step 2: Convert to fraction form
    28,427.10/39,229.55 = 15,680.73/x
  3. Step 3: Cross multiply
    28,427.10x = 39,229.55 × 15,680.73
  4. Step 4: Simplify right side
    28,427.10x = 615,147,981.57
  5. Step 5: Solve for x
    x = 615,147,981.57/28,427.10
  6. Step 6: Final answer
    x = 21,639.49

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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.