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Finding the Fourth Proportional to 22,750.96, 31,396.20 and 12,679.84

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Solution

The fourth proportional to 22,750.96, 31,396.20 and 12,679.84 is: 17,498.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,750.96 : 31,396.20 = 12,679.84 : x
  2. Step 2: Convert to fraction form
    22,750.96/31,396.20 = 12,679.84/x
  3. Step 3: Cross multiply
    22,750.96x = 31,396.20 × 12,679.84
  4. Step 4: Simplify right side
    22,750.96x = 398,098,792.61
  5. Step 5: Solve for x
    x = 398,098,792.61/22,750.96
  6. Step 6: Final answer
    x = 17,498.11

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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.