Home / 15,275.79-21,042.32-12,757.10

Finding the Fourth Proportional to 15,275.79, 21,042.32 and 12,757.10

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Solution

The fourth proportional to 15,275.79, 21,042.32 and 12,757.10 is: 17,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,275.79 : 21,042.32 = 12,757.10 : x
  2. Step 2: Convert to fraction form
    15,275.79/21,042.32 = 12,757.10/x
  3. Step 3: Cross multiply
    15,275.79x = 21,042.32 × 12,757.10
  4. Step 4: Simplify right side
    15,275.79x = 268,438,811.47
  5. Step 5: Solve for x
    x = 268,438,811.47/15,275.79
  6. Step 6: Final answer
    x = 17,572.83

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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.