Home / 13,557.30-20,309.13-10,621.86

Finding the Fourth Proportional to 13,557.30, 20,309.13 and 10,621.86

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Solution

The fourth proportional to 13,557.30, 20,309.13 and 10,621.86 is: 15,911.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,557.30 : 20,309.13 = 10,621.86 : x
  2. Step 2: Convert to fraction form
    13,557.30/20,309.13 = 10,621.86/x
  3. Step 3: Cross multiply
    13,557.30x = 20,309.13 × 10,621.86
  4. Step 4: Simplify right side
    13,557.30x = 215,720,735.58
  5. Step 5: Solve for x
    x = 215,720,735.58/13,557.30
  6. Step 6: Final answer
    x = 15,911.78

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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.