Home / 31,013.28-42,809.46-18,438

Finding the Fourth Proportional to 31,013.28, 42,809.46 and 18,438

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Solution

The fourth proportional to 31,013.28, 42,809.46 and 18,438 is: 25,451.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,013.28 : 42,809.46 = 18,438 : x
  2. Step 2: Convert to fraction form
    31,013.28/42,809.46 = 18,438/x
  3. Step 3: Cross multiply
    31,013.28x = 42,809.46 × 18,438
  4. Step 4: Simplify right side
    31,013.28x = 789,320,823.48
  5. Step 5: Solve for x
    x = 789,320,823.48/31,013.28
  6. Step 6: Final answer
    x = 25,451.06

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.