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Finding the Fourth Proportional to 8,909.32, 12,287.29 and 5,502.21

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Solution

The fourth proportional to 8,909.32, 12,287.29 and 5,502.21 is: 7,588.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.32 : 12,287.29 = 5,502.21 : x
  2. Step 2: Convert to fraction form
    8,909.32/12,287.29 = 5,502.21/x
  3. Step 3: Cross multiply
    8,909.32x = 12,287.29 × 5,502.21
  4. Step 4: Simplify right side
    8,909.32x = 67,607,236.16
  5. Step 5: Solve for x
    x = 67,607,236.16/8,909.32
  6. Step 6: Final answer
    x = 7,588.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.