Home / 15,417.20-21,275.84-9,042.49

Finding the Fourth Proportional to 15,417.20, 21,275.84 and 9,042.49

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Solution

The fourth proportional to 15,417.20, 21,275.84 and 9,042.49 is: 12,478.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417.20 : 21,275.84 = 9,042.49 : x
  2. Step 2: Convert to fraction form
    15,417.20/21,275.84 = 9,042.49/x
  3. Step 3: Cross multiply
    15,417.20x = 21,275.84 × 9,042.49
  4. Step 4: Simplify right side
    15,417.20x = 192,386,472.04
  5. Step 5: Solve for x
    x = 192,386,472.04/15,417.20
  6. Step 6: Final answer
    x = 12,478.69

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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.