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Finding the Fourth Proportional to 12,129.70, 16,717.05 and 9,125.14

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Solution

The fourth proportional to 12,129.70, 16,717.05 and 9,125.14 is: 12,576.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.70 : 16,717.05 = 9,125.14 : x
  2. Step 2: Convert to fraction form
    12,129.70/16,717.05 = 9,125.14/x
  3. Step 3: Cross multiply
    12,129.70x = 16,717.05 × 9,125.14
  4. Step 4: Simplify right side
    12,129.70x = 152,545,421.64
  5. Step 5: Solve for x
    x = 152,545,421.64/12,129.70
  6. Step 6: Final answer
    x = 12,576.19

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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.