Home / 20,422.36-28,181.83-11,470.24

Finding the Fourth Proportional to 20,422.36, 28,181.83 and 11,470.24

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Solution

The fourth proportional to 20,422.36, 28,181.83 and 11,470.24 is: 15,828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.36 : 28,181.83 = 11,470.24 : x
  2. Step 2: Convert to fraction form
    20,422.36/28,181.83 = 11,470.24/x
  3. Step 3: Cross multiply
    20,422.36x = 28,181.83 × 11,470.24
  4. Step 4: Simplify right side
    20,422.36x = 323,252,353.74
  5. Step 5: Solve for x
    x = 323,252,353.74/20,422.36
  6. Step 6: Final answer
    x = 15,828.35

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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.