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Finding the Fourth Proportional to 12,125.70, 16,731.16 and 7,344.68

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Solution

The fourth proportional to 12,125.70, 16,731.16 and 7,344.68 is: 10,134.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.70 : 16,731.16 = 7,344.68 : x
  2. Step 2: Convert to fraction form
    12,125.70/16,731.16 = 7,344.68/x
  3. Step 3: Cross multiply
    12,125.70x = 16,731.16 × 7,344.68
  4. Step 4: Simplify right side
    12,125.70x = 122,884,914.21
  5. Step 5: Solve for x
    x = 122,884,914.21/12,125.70
  6. Step 6: Final answer
    x = 10,134.25

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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.