Home / 21,407.06-29,549.57-12,909.53

Finding the Fourth Proportional to 21,407.06, 29,549.57 and 12,909.53

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Solution

The fourth proportional to 21,407.06, 29,549.57 and 12,909.53 is: 17,819.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.06 : 29,549.57 = 12,909.53 : x
  2. Step 2: Convert to fraction form
    21,407.06/29,549.57 = 12,909.53/x
  3. Step 3: Cross multiply
    21,407.06x = 29,549.57 × 12,909.53
  4. Step 4: Simplify right side
    21,407.06x = 381,471,069.73
  5. Step 5: Solve for x
    x = 381,471,069.73/21,407.06
  6. Step 6: Final answer
    x = 17,819.88

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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.