Home / 30,687.40-42,375.18-29,112.76

Finding the Fourth Proportional to 30,687.40, 42,375.18 and 29,112.76

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Solution

The fourth proportional to 30,687.40, 42,375.18 and 29,112.76 is: 40,200.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,687.40 : 42,375.18 = 29,112.76 : x
  2. Step 2: Convert to fraction form
    30,687.40/42,375.18 = 29,112.76/x
  3. Step 3: Cross multiply
    30,687.40x = 42,375.18 × 29,112.76
  4. Step 4: Simplify right side
    30,687.40x = 1,233,658,445.30
  5. Step 5: Solve for x
    x = 1,233,658,445.30/30,687.40
  6. Step 6: Final answer
    x = 40,200.81

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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.