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Finding the Fourth Proportional to 20,899.26, 31,348.98 and 7,057.98

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Solution

The fourth proportional to 20,899.26, 31,348.98 and 7,057.98 is: 10,587.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.26 : 31,348.98 = 7,057.98 : x
  2. Step 2: Convert to fraction form
    20,899.26/31,348.98 = 7,057.98/x
  3. Step 3: Cross multiply
    20,899.26x = 31,348.98 × 7,057.98
  4. Step 4: Simplify right side
    20,899.26x = 221,260,473.86
  5. Step 5: Solve for x
    x = 221,260,473.86/20,899.26
  6. Step 6: Final answer
    x = 10,587.00

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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.