Home / 31,415.40-47,123.10-27,138.60

Finding the Fourth Proportional to 31,415.40, 47,123.10 and 27,138.60

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Solution

The fourth proportional to 31,415.40, 47,123.10 and 27,138.60 is: 40,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,415.40 : 47,123.10 = 27,138.60 : x
  2. Step 2: Convert to fraction form
    31,415.40/47,123.10 = 27,138.60/x
  3. Step 3: Cross multiply
    31,415.40x = 47,123.10 × 27,138.60
  4. Step 4: Simplify right side
    31,415.40x = 1,278,854,961.66
  5. Step 5: Solve for x
    x = 1,278,854,961.66/31,415.40
  6. Step 6: Final answer
    x = 40,707.90

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1.5x scale

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.