Home / 31,981.12-47,938.88-12,254.56

Finding the Fourth Proportional to 31,981.12, 47,938.88 and 12,254.56

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Solution

The fourth proportional to 31,981.12, 47,938.88 and 12,254.56 is: 18,369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,981.12 : 47,938.88 = 12,254.56 : x
  2. Step 2: Convert to fraction form
    31,981.12/47,938.88 = 12,254.56/x
  3. Step 3: Cross multiply
    31,981.12x = 47,938.88 × 12,254.56
  4. Step 4: Simplify right side
    31,981.12x = 587,469,881.29
  5. Step 5: Solve for x
    x = 587,469,881.29/31,981.12
  6. Step 6: Final answer
    x = 18,369.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.