Home / 20,621.16-28,456.42-11,189.52

Finding the Fourth Proportional to 20,621.16, 28,456.42 and 11,189.52

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Solution

The fourth proportional to 20,621.16, 28,456.42 and 11,189.52 is: 15,441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.16 : 28,456.42 = 11,189.52 : x
  2. Step 2: Convert to fraction form
    20,621.16/28,456.42 = 11,189.52/x
  3. Step 3: Cross multiply
    20,621.16x = 28,456.42 × 11,189.52
  4. Step 4: Simplify right side
    20,621.16x = 318,413,680.72
  5. Step 5: Solve for x
    x = 318,413,680.72/20,621.16
  6. Step 6: Final answer
    x = 15,441.11

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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.