Home / 31,981.23-47,955.65-18,658.55

Finding the Fourth Proportional to 31,981.23, 47,955.65 and 18,658.55

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Solution

The fourth proportional to 31,981.23, 47,955.65 and 18,658.55 is: 27,978.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,981.23 : 47,955.65 = 18,658.55 : x
  2. Step 2: Convert to fraction form
    31,981.23/47,955.65 = 18,658.55/x
  3. Step 3: Cross multiply
    31,981.23x = 47,955.65 × 18,658.55
  4. Step 4: Simplify right side
    31,981.23x = 894,782,919.90
  5. Step 5: Solve for x
    x = 894,782,919.90/31,981.23
  6. Step 6: Final answer
    x = 27,978.38

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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.