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Finding the Fourth Proportional to 31,671.71, 43,700.02 and 18,922.98

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Solution

The fourth proportional to 31,671.71, 43,700.02 and 18,922.98 is: 26,109.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,671.71 : 43,700.02 = 18,922.98 : x
  2. Step 2: Convert to fraction form
    31,671.71/43,700.02 = 18,922.98/x
  3. Step 3: Cross multiply
    31,671.71x = 43,700.02 × 18,922.98
  4. Step 4: Simplify right side
    31,671.71x = 826,934,604.46
  5. Step 5: Solve for x
    x = 826,934,604.46/31,671.71
  6. Step 6: Final answer
    x = 26,109.57

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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.