Home / 20,691.91-31,028.95-6,647.32

Finding the Fourth Proportional to 20,691.91, 31,028.95 and 6,647.32

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Solution

The fourth proportional to 20,691.91, 31,028.95 and 6,647.32 is: 9,968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.91 : 31,028.95 = 6,647.32 : x
  2. Step 2: Convert to fraction form
    20,691.91/31,028.95 = 6,647.32/x
  3. Step 3: Cross multiply
    20,691.91x = 31,028.95 × 6,647.32
  4. Step 4: Simplify right side
    20,691.91x = 206,259,359.91
  5. Step 5: Solve for x
    x = 206,259,359.91/20,691.91
  6. Step 6: Final answer
    x = 9,968.12

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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.