Home / 15,689.30-21,642.19-9,398.03

Finding the Fourth Proportional to 15,689.30, 21,642.19 and 9,398.03

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Solution

The fourth proportional to 15,689.30, 21,642.19 and 9,398.03 is: 12,963.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.30 : 21,642.19 = 9,398.03 : x
  2. Step 2: Convert to fraction form
    15,689.30/21,642.19 = 9,398.03/x
  3. Step 3: Cross multiply
    15,689.30x = 21,642.19 × 9,398.03
  4. Step 4: Simplify right side
    15,689.30x = 203,393,819.18
  5. Step 5: Solve for x
    x = 203,393,819.18/15,689.30
  6. Step 6: Final answer
    x = 12,963.86

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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.