Home / 20,563.91-28,378.28-11,132.47

Finding the Fourth Proportional to 20,563.91, 28,378.28 and 11,132.47

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Solution

The fourth proportional to 20,563.91, 28,378.28 and 11,132.47 is: 15,362.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.91 : 28,378.28 = 11,132.47 : x
  2. Step 2: Convert to fraction form
    20,563.91/28,378.28 = 11,132.47/x
  3. Step 3: Cross multiply
    20,563.91x = 28,378.28 × 11,132.47
  4. Step 4: Simplify right side
    20,563.91x = 315,920,414.06
  5. Step 5: Solve for x
    x = 315,920,414.06/20,563.91
  6. Step 6: Final answer
    x = 15,362.86

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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.