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Finding the Fourth Proportional to 22,691.96, 31,314.90 and 12,620.12

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Solution

The fourth proportional to 22,691.96, 31,314.90 and 12,620.12 is: 17,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,691.96 : 31,314.90 = 12,620.12 : x
  2. Step 2: Convert to fraction form
    22,691.96/31,314.90 = 12,620.12/x
  3. Step 3: Cross multiply
    22,691.96x = 31,314.90 × 12,620.12
  4. Step 4: Simplify right side
    22,691.96x = 395,197,795.79
  5. Step 5: Solve for x
    x = 395,197,795.79/22,691.96
  6. Step 6: Final answer
    x = 17,415.76

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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.