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Finding the Fourth Proportional to 8,958.97, 13,420.71 and 6,140.87

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Solution

The fourth proportional to 8,958.97, 13,420.71 and 6,140.87 is: 9,199.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.97 : 13,420.71 = 6,140.87 : x
  2. Step 2: Convert to fraction form
    8,958.97/13,420.71 = 6,140.87/x
  3. Step 3: Cross multiply
    8,958.97x = 13,420.71 × 6,140.87
  4. Step 4: Simplify right side
    8,958.97x = 82,414,737.61
  5. Step 5: Solve for x
    x = 82,414,737.61/8,958.97
  6. Step 6: Final answer
    x = 9,199.14

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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.