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Finding the Fourth Proportional to 19,843.80, 29,729.70 and 9,432.60

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Solution

The fourth proportional to 19,843.80, 29,729.70 and 9,432.60 is: 14,131.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,843.80 : 29,729.70 = 9,432.60 : x
  2. Step 2: Convert to fraction form
    19,843.80/29,729.70 = 9,432.60/x
  3. Step 3: Cross multiply
    19,843.80x = 29,729.70 × 9,432.60
  4. Step 4: Simplify right side
    19,843.80x = 280,428,368.22
  5. Step 5: Solve for x
    x = 280,428,368.22/19,843.80
  6. Step 6: Final answer
    x = 14,131.79

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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.