Home / 11,121.93-15,358.47-7,149.96

Finding the Fourth Proportional to 11,121.93, 15,358.47 and 7,149.96

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Solution

The fourth proportional to 11,121.93, 15,358.47 and 7,149.96 is: 9,873.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.93 : 15,358.47 = 7,149.96 : x
  2. Step 2: Convert to fraction form
    11,121.93/15,358.47 = 7,149.96/x
  3. Step 3: Cross multiply
    11,121.93x = 15,358.47 × 7,149.96
  4. Step 4: Simplify right side
    11,121.93x = 109,812,446.16
  5. Step 5: Solve for x
    x = 109,812,446.16/11,121.93
  6. Step 6: Final answer
    x = 9,873.51

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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.