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Finding the Fourth Proportional to 12,138.66, 16,750.98 and 6,761.13

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Solution

The fourth proportional to 12,138.66, 16,750.98 and 6,761.13 is: 9,330.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.66 : 16,750.98 = 6,761.13 : x
  2. Step 2: Convert to fraction form
    12,138.66/16,750.98 = 6,761.13/x
  3. Step 3: Cross multiply
    12,138.66x = 16,750.98 × 6,761.13
  4. Step 4: Simplify right side
    12,138.66x = 113,255,553.41
  5. Step 5: Solve for x
    x = 113,255,553.41/12,138.66
  6. Step 6: Final answer
    x = 9,330.15

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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.