Home / 15,540.28-21,445.52-8,825.60

Finding the Fourth Proportional to 15,540.28, 21,445.52 and 8,825.60

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Solution

The fourth proportional to 15,540.28, 21,445.52 and 8,825.60 is: 12,179.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,540.28 : 21,445.52 = 8,825.60 : x
  2. Step 2: Convert to fraction form
    15,540.28/21,445.52 = 8,825.60/x
  3. Step 3: Cross multiply
    15,540.28x = 21,445.52 × 8,825.60
  4. Step 4: Simplify right side
    15,540.28x = 189,269,581.31
  5. Step 5: Solve for x
    x = 189,269,581.31/15,540.28
  6. Step 6: Final answer
    x = 12,179.29

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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.