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Finding the Fourth Proportional to 28,909.60, 43,365.60 and 9,187.60

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Solution

The fourth proportional to 28,909.60, 43,365.60 and 9,187.60 is: 13,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.60 : 43,365.60 = 9,187.60 : x
  2. Step 2: Convert to fraction form
    28,909.60/43,365.60 = 9,187.60/x
  3. Step 3: Cross multiply
    28,909.60x = 43,365.60 × 9,187.60
  4. Step 4: Simplify right side
    28,909.60x = 398,425,786.56
  5. Step 5: Solve for x
    x = 398,425,786.56/28,909.60
  6. Step 6: Final answer
    x = 13,781.78

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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.