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Finding the Fourth Proportional to 22,750.40, 31,396.02 and 12,679.76

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Solution

The fourth proportional to 22,750.40, 31,396.02 and 12,679.76 is: 17,498.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,750.40 : 31,396.02 = 12,679.76 : x
  2. Step 2: Convert to fraction form
    22,750.40/31,396.02 = 12,679.76/x
  3. Step 3: Cross multiply
    22,750.40x = 31,396.02 × 12,679.76
  4. Step 4: Simplify right side
    22,750.40x = 398,093,998.56
  5. Step 5: Solve for x
    x = 398,093,998.56/22,750.40
  6. Step 6: Final answer
    x = 17,498.33

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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.