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Finding the Fourth Proportional to 13,909.60, 20,879 and 7,334.04

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Solution

The fourth proportional to 13,909.60, 20,879 and 7,334.04 is: 11,008.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.60 : 20,879 = 7,334.04 : x
  2. Step 2: Convert to fraction form
    13,909.60/20,879 = 7,334.04/x
  3. Step 3: Cross multiply
    13,909.60x = 20,879 × 7,334.04
  4. Step 4: Simplify right side
    13,909.60x = 153,127,421.16
  5. Step 5: Solve for x
    x = 153,127,421.16/13,909.60
  6. Step 6: Final answer
    x = 11,008.76

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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.