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Finding the Fourth Proportional to 12,062.88, 18,128.28 and 7,134.84

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Solution

The fourth proportional to 12,062.88, 18,128.28 and 7,134.84 is: 10,722.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,062.88 : 18,128.28 = 7,134.84 : x
  2. Step 2: Convert to fraction form
    12,062.88/18,128.28 = 7,134.84/x
  3. Step 3: Cross multiply
    12,062.88x = 18,128.28 × 7,134.84
  4. Step 4: Simplify right side
    12,062.88x = 129,342,377.28
  5. Step 5: Solve for x
    x = 129,342,377.28/12,062.88
  6. Step 6: Final answer
    x = 10,722.35

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1.5x scale

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.