Home / 20,920.92-31,362.16-9,067.28

Finding the Fourth Proportional to 20,920.92, 31,362.16 and 9,067.28

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Solution

The fourth proportional to 20,920.92, 31,362.16 and 9,067.28 is: 13,592.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.92 : 31,362.16 = 9,067.28 : x
  2. Step 2: Convert to fraction form
    20,920.92/31,362.16 = 9,067.28/x
  3. Step 3: Cross multiply
    20,920.92x = 31,362.16 × 9,067.28
  4. Step 4: Simplify right side
    20,920.92x = 284,369,486.12
  5. Step 5: Solve for x
    x = 284,369,486.12/20,920.92
  6. Step 6: Final answer
    x = 13,592.59

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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.