Home / 20,422.96-28,186.34-11,470.47

Finding the Fourth Proportional to 20,422.96, 28,186.34 and 11,470.47

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Solution

The fourth proportional to 20,422.96, 28,186.34 and 11,470.47 is: 15,830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.96 : 28,186.34 = 11,470.47 : x
  2. Step 2: Convert to fraction form
    20,422.96/28,186.34 = 11,470.47/x
  3. Step 3: Cross multiply
    20,422.96x = 28,186.34 × 11,470.47
  4. Step 4: Simplify right side
    20,422.96x = 323,310,510.03
  5. Step 5: Solve for x
    x = 323,310,510.03/20,422.96
  6. Step 6: Final answer
    x = 15,830.74

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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.