Home / 29,385.81-40,542.39-18,781.56

Finding the Fourth Proportional to 29,385.81, 40,542.39 and 18,781.56

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Solution

The fourth proportional to 29,385.81, 40,542.39 and 18,781.56 is: 25,912.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,385.81 : 40,542.39 = 18,781.56 : x
  2. Step 2: Convert to fraction form
    29,385.81/40,542.39 = 18,781.56/x
  3. Step 3: Cross multiply
    29,385.81x = 40,542.39 × 18,781.56
  4. Step 4: Simplify right side
    29,385.81x = 761,449,330.33
  5. Step 5: Solve for x
    x = 761,449,330.33/29,385.81
  6. Step 6: Final answer
    x = 25,912.14

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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.