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Finding the Fourth Proportional to 8,709.68, 13,080.96 and 5,445.68

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Solution

The fourth proportional to 8,709.68, 13,080.96 and 5,445.68 is: 8,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.68 : 13,080.96 = 5,445.68 : x
  2. Step 2: Convert to fraction form
    8,709.68/13,080.96 = 5,445.68/x
  3. Step 3: Cross multiply
    8,709.68x = 13,080.96 × 5,445.68
  4. Step 4: Simplify right side
    8,709.68x = 71,234,722.25
  5. Step 5: Solve for x
    x = 71,234,722.25/8,709.68
  6. Step 6: Final answer
    x = 8,178.80

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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.