Home / 13,612.56-20,405.16-8,687.76

Finding the Fourth Proportional to 13,612.56, 20,405.16 and 8,687.76

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Solution

The fourth proportional to 13,612.56, 20,405.16 and 8,687.76 is: 13,022.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.56 : 20,405.16 = 8,687.76 : x
  2. Step 2: Convert to fraction form
    13,612.56/20,405.16 = 8,687.76/x
  3. Step 3: Cross multiply
    13,612.56x = 20,405.16 × 8,687.76
  4. Step 4: Simplify right side
    13,612.56x = 177,275,132.84
  5. Step 5: Solve for x
    x = 177,275,132.84/13,612.56
  6. Step 6: Final answer
    x = 13,022.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.