Home / 31,134.36-42,976.50-18,387.60

Finding the Fourth Proportional to 31,134.36, 42,976.50 and 18,387.60

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Solution

The fourth proportional to 31,134.36, 42,976.50 and 18,387.60 is: 25,381.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,134.36 : 42,976.50 = 18,387.60 : x
  2. Step 2: Convert to fraction form
    31,134.36/42,976.50 = 18,387.60/x
  3. Step 3: Cross multiply
    31,134.36x = 42,976.50 × 18,387.60
  4. Step 4: Simplify right side
    31,134.36x = 790,234,691.40
  5. Step 5: Solve for x
    x = 790,234,691.40/31,134.36
  6. Step 6: Final answer
    x = 25,381.43

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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.