Home / 20,630.44-28,470.80-11,432.20

Finding the Fourth Proportional to 20,630.44, 28,470.80 and 11,432.20

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Solution

The fourth proportional to 20,630.44, 28,470.80 and 11,432.20 is: 15,776.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.44 : 28,470.80 = 11,432.20 : x
  2. Step 2: Convert to fraction form
    20,630.44/28,470.80 = 11,432.20/x
  3. Step 3: Cross multiply
    20,630.44x = 28,470.80 × 11,432.20
  4. Step 4: Simplify right side
    20,630.44x = 325,483,879.76
  5. Step 5: Solve for x
    x = 325,483,879.76/20,630.44
  6. Step 6: Final answer
    x = 15,776.88

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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.