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Finding the Fourth Proportional to 10,507.98, 15,761.96 and 7,211.08

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Solution

The fourth proportional to 10,507.98, 15,761.96 and 7,211.08 is: 10,816.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,507.98 : 15,761.96 = 7,211.08 : x
  2. Step 2: Convert to fraction form
    10,507.98/15,761.96 = 7,211.08/x
  3. Step 3: Cross multiply
    10,507.98x = 15,761.96 × 7,211.08
  4. Step 4: Simplify right side
    10,507.98x = 113,660,754.52
  5. Step 5: Solve for x
    x = 113,660,754.52/10,507.98
  6. Step 6: Final answer
    x = 10,816.61

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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.