Home / 20,422.96-28,182.38-11,470.22

Finding the Fourth Proportional to 20,422.96, 28,182.38 and 11,470.22

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Solution

The fourth proportional to 20,422.96, 28,182.38 and 11,470.22 is: 15,828.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.96 : 28,182.38 = 11,470.22 : x
  2. Step 2: Convert to fraction form
    20,422.96/28,182.38 = 11,470.22/x
  3. Step 3: Cross multiply
    20,422.96x = 28,182.38 × 11,470.22
  4. Step 4: Simplify right side
    20,422.96x = 323,258,098.72
  5. Step 5: Solve for x
    x = 323,258,098.72/20,422.96
  6. Step 6: Final answer
    x = 15,828.17

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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.