Home / 11,512.20-15,865.12-10,086.60

Finding the Fourth Proportional to 11,512.20, 15,865.12 and 10,086.60

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Solution

The fourth proportional to 11,512.20, 15,865.12 and 10,086.60 is: 13,900.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.20 : 15,865.12 = 10,086.60 : x
  2. Step 2: Convert to fraction form
    11,512.20/15,865.12 = 10,086.60/x
  3. Step 3: Cross multiply
    11,512.20x = 15,865.12 × 10,086.60
  4. Step 4: Simplify right side
    11,512.20x = 160,025,068.96
  5. Step 5: Solve for x
    x = 160,025,068.96/11,512.20
  6. Step 6: Final answer
    x = 13,900.48

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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.