Home / 20,631.48-28,470.62-11,199.80

Finding the Fourth Proportional to 20,631.48, 28,470.62 and 11,199.80

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Solution

The fourth proportional to 20,631.48, 28,470.62 and 11,199.80 is: 15,455.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.48 : 28,470.62 = 11,199.80 : x
  2. Step 2: Convert to fraction form
    20,631.48/28,470.62 = 11,199.80/x
  3. Step 3: Cross multiply
    20,631.48x = 28,470.62 × 11,199.80
  4. Step 4: Simplify right side
    20,631.48x = 318,865,249.88
  5. Step 5: Solve for x
    x = 318,865,249.88/20,631.48
  6. Step 6: Final answer
    x = 15,455.28

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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.