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Finding the Fourth Proportional to 18,909.20, 28,223.56 and 16,695.20

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Solution

The fourth proportional to 18,909.20, 28,223.56 and 16,695.20 is: 24,918.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.20 : 28,223.56 = 16,695.20 : x
  2. Step 2: Convert to fraction form
    18,909.20/28,223.56 = 16,695.20/x
  3. Step 3: Cross multiply
    18,909.20x = 28,223.56 × 16,695.20
  4. Step 4: Simplify right side
    18,909.20x = 471,197,978.91
  5. Step 5: Solve for x
    x = 471,197,978.91/18,909.20
  6. Step 6: Final answer
    x = 24,918.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.