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Finding the Fourth Proportional to 7,062, 9,711 and 6,128.88

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Solution

The fourth proportional to 7,062, 9,711 and 6,128.88 is: 8,427.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,062 : 9,711 = 6,128.88 : x
  2. Step 2: Convert to fraction form
    7,062/9,711 = 6,128.88/x
  3. Step 3: Cross multiply
    7,062x = 9,711 × 6,128.88
  4. Step 4: Simplify right side
    7,062x = 59,517,553.68
  5. Step 5: Solve for x
    x = 59,517,553.68/7,062
  6. Step 6: Final answer
    x = 8,427.86

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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.