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Finding the Fourth Proportional to 28,778.60, 43,167.90 and 9,063.20

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Solution

The fourth proportional to 28,778.60, 43,167.90 and 9,063.20 is: 13,594.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.60 : 43,167.90 = 9,063.20 : x
  2. Step 2: Convert to fraction form
    28,778.60/43,167.90 = 9,063.20/x
  3. Step 3: Cross multiply
    28,778.60x = 43,167.90 × 9,063.20
  4. Step 4: Simplify right side
    28,778.60x = 391,239,311.28
  5. Step 5: Solve for x
    x = 391,239,311.28/28,778.60
  6. Step 6: Final answer
    x = 13,594.80

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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.