Home / 13,420.92-18,521.76-8,115.96

Finding the Fourth Proportional to 13,420.92, 18,521.76 and 8,115.96

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Solution

The fourth proportional to 13,420.92, 18,521.76 and 8,115.96 is: 11,200.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.92 : 18,521.76 = 8,115.96 : x
  2. Step 2: Convert to fraction form
    13,420.92/18,521.76 = 8,115.96/x
  3. Step 3: Cross multiply
    13,420.92x = 18,521.76 × 8,115.96
  4. Step 4: Simplify right side
    13,420.92x = 150,321,863.29
  5. Step 5: Solve for x
    x = 150,321,863.29/13,420.92
  6. Step 6: Final answer
    x = 11,200.56

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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.