Home / 20,630.80-28,470.72-11,199.52

Finding the Fourth Proportional to 20,630.80, 28,470.72 and 11,199.52

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Solution

The fourth proportional to 20,630.80, 28,470.72 and 11,199.52 is: 15,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.80 : 28,470.72 = 11,199.52 : x
  2. Step 2: Convert to fraction form
    20,630.80/28,470.72 = 11,199.52/x
  3. Step 3: Cross multiply
    20,630.80x = 28,470.72 × 11,199.52
  4. Step 4: Simplify right side
    20,630.80x = 318,858,398.05
  5. Step 5: Solve for x
    x = 318,858,398.05/20,630.80
  6. Step 6: Final answer
    x = 15,455.45

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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.