Home / 8,121.90-12,168.45-5,040.30

Finding the Fourth Proportional to 8,121.90, 12,168.45 and 5,040.30

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Solution

The fourth proportional to 8,121.90, 12,168.45 and 5,040.30 is: 7,551.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.90 : 12,168.45 = 5,040.30 : x
  2. Step 2: Convert to fraction form
    8,121.90/12,168.45 = 5,040.30/x
  3. Step 3: Cross multiply
    8,121.90x = 12,168.45 × 5,040.30
  4. Step 4: Simplify right side
    8,121.90x = 61,332,638.54
  5. Step 5: Solve for x
    x = 61,332,638.54/8,121.90
  6. Step 6: Final answer
    x = 7,551.51

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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.