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Finding the Fourth Proportional to 38,390.80, 57,554.20 and 16,221.20

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Solution

The fourth proportional to 38,390.80, 57,554.20 and 16,221.20 is: 24,318.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,390.80 : 57,554.20 = 16,221.20 : x
  2. Step 2: Convert to fraction form
    38,390.80/57,554.20 = 16,221.20/x
  3. Step 3: Cross multiply
    38,390.80x = 57,554.20 × 16,221.20
  4. Step 4: Simplify right side
    38,390.80x = 933,598,189.04
  5. Step 5: Solve for x
    x = 933,598,189.04/38,390.80
  6. Step 6: Final answer
    x = 24,318.28

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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.