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Finding the Fourth Proportional to 8,981.10, 12,396.74 and 5,398.68

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Solution

The fourth proportional to 8,981.10, 12,396.74 and 5,398.68 is: 7,451.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.10 : 12,396.74 = 5,398.68 : x
  2. Step 2: Convert to fraction form
    8,981.10/12,396.74 = 5,398.68/x
  3. Step 3: Cross multiply
    8,981.10x = 12,396.74 × 5,398.68
  4. Step 4: Simplify right side
    8,981.10x = 66,926,032.30
  5. Step 5: Solve for x
    x = 66,926,032.30/8,981.10
  6. Step 6: Final answer
    x = 7,451.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.