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Finding the Fourth Proportional to 31,702.76, 43,748.22 and 18,273.20

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Solution

The fourth proportional to 31,702.76, 43,748.22 and 18,273.20 is: 25,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,702.76 : 43,748.22 = 18,273.20 : x
  2. Step 2: Convert to fraction form
    31,702.76/43,748.22 = 18,273.20/x
  3. Step 3: Cross multiply
    31,702.76x = 43,748.22 × 18,273.20
  4. Step 4: Simplify right side
    31,702.76x = 799,419,754.96
  5. Step 5: Solve for x
    x = 799,419,754.96/31,702.76
  6. Step 6: Final answer
    x = 25,216.10

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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.