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Finding the Fourth Proportional to 8,617.81, 12,913.21 and 5,990.42

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Solution

The fourth proportional to 8,617.81, 12,913.21 and 5,990.42 is: 8,976.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.81 : 12,913.21 = 5,990.42 : x
  2. Step 2: Convert to fraction form
    8,617.81/12,913.21 = 5,990.42/x
  3. Step 3: Cross multiply
    8,617.81x = 12,913.21 × 5,990.42
  4. Step 4: Simplify right side
    8,617.81x = 77,355,487.46
  5. Step 5: Solve for x
    x = 77,355,487.46/8,617.81
  6. Step 6: Final answer
    x = 8,976.24

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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.