Home / 31,442.70-43,393.78-18,018.30

Finding the Fourth Proportional to 31,442.70, 43,393.78 and 18,018.30

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Solution

The fourth proportional to 31,442.70, 43,393.78 and 18,018.30 is: 24,866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,442.70 : 43,393.78 = 18,018.30 : x
  2. Step 2: Convert to fraction form
    31,442.70/43,393.78 = 18,018.30/x
  3. Step 3: Cross multiply
    31,442.70x = 43,393.78 × 18,018.30
  4. Step 4: Simplify right side
    31,442.70x = 781,882,146.17
  5. Step 5: Solve for x
    x = 781,882,146.17/31,442.70
  6. Step 6: Final answer
    x = 24,866.89

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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.