Home / 7,921.86-11,868.12-5,725.14

Finding the Fourth Proportional to 7,921.86, 11,868.12 and 5,725.14

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Solution

The fourth proportional to 7,921.86, 11,868.12 and 5,725.14 is: 8,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.86 : 11,868.12 = 5,725.14 : x
  2. Step 2: Convert to fraction form
    7,921.86/11,868.12 = 5,725.14/x
  3. Step 3: Cross multiply
    7,921.86x = 11,868.12 × 5,725.14
  4. Step 4: Simplify right side
    7,921.86x = 67,946,648.54
  5. Step 5: Solve for x
    x = 67,946,648.54/7,921.86
  6. Step 6: Final answer
    x = 8,577.11

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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.