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Finding the Fourth Proportional to 12,671.60, 17,450.52 and 9,129.20

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Solution

The fourth proportional to 12,671.60, 17,450.52 and 9,129.20 is: 12,572.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.60 : 17,450.52 = 9,129.20 : x
  2. Step 2: Convert to fraction form
    12,671.60/17,450.52 = 9,129.20/x
  3. Step 3: Cross multiply
    12,671.60x = 17,450.52 × 9,129.20
  4. Step 4: Simplify right side
    12,671.60x = 159,309,287.18
  5. Step 5: Solve for x
    x = 159,309,287.18/12,671.60
  6. Step 6: Final answer
    x = 12,572.15

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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.