Home / 20,620.56-28,456.38-11,189.13

Finding the Fourth Proportional to 20,620.56, 28,456.38 and 11,189.13

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Solution

The fourth proportional to 20,620.56, 28,456.38 and 11,189.13 is: 15,441.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.56 : 28,456.38 = 11,189.13 : x
  2. Step 2: Convert to fraction form
    20,620.56/28,456.38 = 11,189.13/x
  3. Step 3: Cross multiply
    20,620.56x = 28,456.38 × 11,189.13
  4. Step 4: Simplify right side
    20,620.56x = 318,402,135.15
  5. Step 5: Solve for x
    x = 318,402,135.15/20,620.56
  6. Step 6: Final answer
    x = 15,441.00

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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.