Home / 11,121.80-15,358.50-7,149.83

Finding the Fourth Proportional to 11,121.80, 15,358.50 and 7,149.83

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Solution

The fourth proportional to 11,121.80, 15,358.50 and 7,149.83 is: 9,873.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.80 : 15,358.50 = 7,149.83 : x
  2. Step 2: Convert to fraction form
    11,121.80/15,358.50 = 7,149.83/x
  3. Step 3: Cross multiply
    11,121.80x = 15,358.50 × 7,149.83
  4. Step 4: Simplify right side
    11,121.80x = 109,810,587.26
  5. Step 5: Solve for x
    x = 109,810,587.26/11,121.80
  6. Step 6: Final answer
    x = 9,873.46

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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.