Home / 13,719.62-20,557.56-8,785.20

Finding the Fourth Proportional to 13,719.62, 20,557.56 and 8,785.20

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Solution

The fourth proportional to 13,719.62, 20,557.56 and 8,785.20 is: 13,163.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.62 : 20,557.56 = 8,785.20 : x
  2. Step 2: Convert to fraction form
    13,719.62/20,557.56 = 8,785.20/x
  3. Step 3: Cross multiply
    13,719.62x = 20,557.56 × 8,785.20
  4. Step 4: Simplify right side
    13,719.62x = 180,602,276.11
  5. Step 5: Solve for x
    x = 180,602,276.11/13,719.62
  6. Step 6: Final answer
    x = 13,163.79

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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.