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Finding the Fourth Proportional to 18,909.12, 28,368 and 9,050.88

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Solution

The fourth proportional to 18,909.12, 28,368 and 9,050.88 is: 13,578.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.12 : 28,368 = 9,050.88 : x
  2. Step 2: Convert to fraction form
    18,909.12/28,368 = 9,050.88/x
  3. Step 3: Cross multiply
    18,909.12x = 28,368 × 9,050.88
  4. Step 4: Simplify right side
    18,909.12x = 256,755,363.84
  5. Step 5: Solve for x
    x = 256,755,363.84/18,909.12
  6. Step 6: Final answer
    x = 13,578.39

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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.