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Finding the Fourth Proportional to 20,750.88, 31,126.59 and 6,899.88

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Solution

The fourth proportional to 20,750.88, 31,126.59 and 6,899.88 is: 10,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.88 : 31,126.59 = 6,899.88 : x
  2. Step 2: Convert to fraction form
    20,750.88/31,126.59 = 6,899.88/x
  3. Step 3: Cross multiply
    20,750.88x = 31,126.59 × 6,899.88
  4. Step 4: Simplify right side
    20,750.88x = 214,769,545.68
  5. Step 5: Solve for x
    x = 214,769,545.68/20,750.88
  6. Step 6: Final answer
    x = 10,349.90

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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.