Home / 31,072.38-42,885.44-18,324.78

Finding the Fourth Proportional to 31,072.38, 42,885.44 and 18,324.78

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Solution

The fourth proportional to 31,072.38, 42,885.44 and 18,324.78 is: 25,291.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072.38 : 42,885.44 = 18,324.78 : x
  2. Step 2: Convert to fraction form
    31,072.38/42,885.44 = 18,324.78/x
  3. Step 3: Cross multiply
    31,072.38x = 42,885.44 × 18,324.78
  4. Step 4: Simplify right side
    31,072.38x = 785,866,253.20
  5. Step 5: Solve for x
    x = 785,866,253.20/31,072.38
  6. Step 6: Final answer
    x = 25,291.47

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Half scale
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Double scale
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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.