Home / 20,887.30-28,824.15-11,456.20

Finding the Fourth Proportional to 20,887.30, 28,824.15 and 11,456.20

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Solution

The fourth proportional to 20,887.30, 28,824.15 and 11,456.20 is: 15,809.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.30 : 28,824.15 = 11,456.20 : x
  2. Step 2: Convert to fraction form
    20,887.30/28,824.15 = 11,456.20/x
  3. Step 3: Cross multiply
    20,887.30x = 28,824.15 × 11,456.20
  4. Step 4: Simplify right side
    20,887.30x = 330,215,227.23
  5. Step 5: Solve for x
    x = 330,215,227.23/20,887.30
  6. Step 6: Final answer
    x = 15,809.38

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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.