Home / 31,118.38-42,942.89-16,971.22

Finding the Fourth Proportional to 31,118.38, 42,942.89 and 16,971.22

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Solution

The fourth proportional to 31,118.38, 42,942.89 and 16,971.22 is: 23,420.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,118.38 : 42,942.89 = 16,971.22 : x
  2. Step 2: Convert to fraction form
    31,118.38/42,942.89 = 16,971.22/x
  3. Step 3: Cross multiply
    31,118.38x = 42,942.89 × 16,971.22
  4. Step 4: Simplify right side
    31,118.38x = 728,793,329.73
  5. Step 5: Solve for x
    x = 728,793,329.73/31,118.38
  6. Step 6: Final answer
    x = 23,420.03

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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.