Home / 20,387.45-28,132.42-11,433.10

Finding the Fourth Proportional to 20,387.45, 28,132.42 and 11,433.10

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Solution

The fourth proportional to 20,387.45, 28,132.42 and 11,433.10 is: 15,776.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.45 : 28,132.42 = 11,433.10 : x
  2. Step 2: Convert to fraction form
    20,387.45/28,132.42 = 11,433.10/x
  3. Step 3: Cross multiply
    20,387.45x = 28,132.42 × 11,433.10
  4. Step 4: Simplify right side
    20,387.45x = 321,640,771.10
  5. Step 5: Solve for x
    x = 321,640,771.10/20,387.45
  6. Step 6: Final answer
    x = 15,776.41

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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.