Home / 31,878.28-43,989.42-18,450.46

Finding the Fourth Proportional to 31,878.28, 43,989.42 and 18,450.46

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Solution

The fourth proportional to 31,878.28, 43,989.42 and 18,450.46 is: 25,460.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,878.28 : 43,989.42 = 18,450.46 : x
  2. Step 2: Convert to fraction form
    31,878.28/43,989.42 = 18,450.46/x
  3. Step 3: Cross multiply
    31,878.28x = 43,989.42 × 18,450.46
  4. Step 4: Simplify right side
    31,878.28x = 811,625,034.13
  5. Step 5: Solve for x
    x = 811,625,034.13/31,878.28
  6. Step 6: Final answer
    x = 25,460.13

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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.