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Finding the Fourth Proportional to 20,010.80, 29,987.40 and 8,908.40

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Solution

The fourth proportional to 20,010.80, 29,987.40 and 8,908.40 is: 13,349.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,010.80 : 29,987.40 = 8,908.40 : x
  2. Step 2: Convert to fraction form
    20,010.80/29,987.40 = 8,908.40/x
  3. Step 3: Cross multiply
    20,010.80x = 29,987.40 × 8,908.40
  4. Step 4: Simplify right side
    20,010.80x = 267,139,754.16
  5. Step 5: Solve for x
    x = 267,139,754.16/20,010.80
  6. Step 6: Final answer
    x = 13,349.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.