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Finding the Fourth Proportional to 8,700.97, 13,022.56 and 7,922.76

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Solution

The fourth proportional to 8,700.97, 13,022.56 and 7,922.76 is: 11,857.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.97 : 13,022.56 = 7,922.76 : x
  2. Step 2: Convert to fraction form
    8,700.97/13,022.56 = 7,922.76/x
  3. Step 3: Cross multiply
    8,700.97x = 13,022.56 × 7,922.76
  4. Step 4: Simplify right side
    8,700.97x = 103,174,617.47
  5. Step 5: Solve for x
    x = 103,174,617.47/8,700.97
  6. Step 6: Final answer
    x = 11,857.83

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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.