Home / 20,563.28-28,377.36-11,131.88

Finding the Fourth Proportional to 20,563.28, 28,377.36 and 11,131.88

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Solution

The fourth proportional to 20,563.28, 28,377.36 and 11,131.88 is: 15,362.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.28 : 28,377.36 = 11,131.88 : x
  2. Step 2: Convert to fraction form
    20,563.28/28,377.36 = 11,131.88/x
  3. Step 3: Cross multiply
    20,563.28x = 28,377.36 × 11,131.88
  4. Step 4: Simplify right side
    20,563.28x = 315,893,366.24
  5. Step 5: Solve for x
    x = 315,893,366.24/20,563.28
  6. Step 6: Final answer
    x = 15,362.01

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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.