Home / 21,182.38-31,774.39-6,391.30

Finding the Fourth Proportional to 21,182.38, 31,774.39 and 6,391.30

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Solution

The fourth proportional to 21,182.38, 31,774.39 and 6,391.30 is: 9,587.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.38 : 31,774.39 = 6,391.30 : x
  2. Step 2: Convert to fraction form
    21,182.38/31,774.39 = 6,391.30/x
  3. Step 3: Cross multiply
    21,182.38x = 31,774.39 × 6,391.30
  4. Step 4: Simplify right side
    21,182.38x = 203,079,569.56
  5. Step 5: Solve for x
    x = 203,079,569.56/21,182.38
  6. Step 6: Final answer
    x = 9,587.19

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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.