Home / 15,112.55-20,854.10-8,739.55

Finding the Fourth Proportional to 15,112.55, 20,854.10 and 8,739.55

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Solution

The fourth proportional to 15,112.55, 20,854.10 and 8,739.55 is: 12,059.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.55 : 20,854.10 = 8,739.55 : x
  2. Step 2: Convert to fraction form
    15,112.55/20,854.10 = 8,739.55/x
  3. Step 3: Cross multiply
    15,112.55x = 20,854.10 × 8,739.55
  4. Step 4: Simplify right side
    15,112.55x = 182,255,449.66
  5. Step 5: Solve for x
    x = 182,255,449.66/15,112.55
  6. Step 6: Final answer
    x = 12,059.87

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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.