Home / 20,918.23-31,377.13-5,123.33

Finding the Fourth Proportional to 20,918.23, 31,377.13 and 5,123.33

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Solution

The fourth proportional to 20,918.23, 31,377.13 and 5,123.33 is: 7,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.23 : 31,377.13 = 5,123.33 : x
  2. Step 2: Convert to fraction form
    20,918.23/31,377.13 = 5,123.33/x
  3. Step 3: Cross multiply
    20,918.23x = 31,377.13 × 5,123.33
  4. Step 4: Simplify right side
    20,918.23x = 160,755,391.44
  5. Step 5: Solve for x
    x = 160,755,391.44/20,918.23
  6. Step 6: Final answer
    x = 7,684.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.