Home / 12,839.32-19,132.13-11,531.20

Finding the Fourth Proportional to 12,839.32, 19,132.13 and 11,531.20

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Solution

The fourth proportional to 12,839.32, 19,132.13 and 11,531.20 is: 17,182.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,839.32 : 19,132.13 = 11,531.20 : x
  2. Step 2: Convert to fraction form
    12,839.32/19,132.13 = 11,531.20/x
  3. Step 3: Cross multiply
    12,839.32x = 19,132.13 × 11,531.20
  4. Step 4: Simplify right side
    12,839.32x = 220,616,417.46
  5. Step 5: Solve for x
    x = 220,616,417.46/12,839.32
  6. Step 6: Final answer
    x = 17,182.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.