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Finding the Fourth Proportional to 53,711.52, 80,555.10 and 20,419.74

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Solution

The fourth proportional to 53,711.52, 80,555.10 and 20,419.74 is: 30,624.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,711.52 : 80,555.10 = 20,419.74 : x
  2. Step 2: Convert to fraction form
    53,711.52/80,555.10 = 20,419.74/x
  3. Step 3: Cross multiply
    53,711.52x = 80,555.10 × 20,419.74
  4. Step 4: Simplify right side
    53,711.52x = 1,644,914,197.67
  5. Step 5: Solve for x
    x = 1,644,914,197.67/53,711.52
  6. Step 6: Final answer
    x = 30,624.98

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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.