Home / 8,091.79-12,138.88-4,145.28

Finding the Fourth Proportional to 8,091.79, 12,138.88 and 4,145.28

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Solution

The fourth proportional to 8,091.79, 12,138.88 and 4,145.28 is: 6,218.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.79 : 12,138.88 = 4,145.28 : x
  2. Step 2: Convert to fraction form
    8,091.79/12,138.88 = 4,145.28/x
  3. Step 3: Cross multiply
    8,091.79x = 12,138.88 × 4,145.28
  4. Step 4: Simplify right side
    8,091.79x = 50,319,061.67
  5. Step 5: Solve for x
    x = 50,319,061.67/8,091.79
  6. Step 6: Final answer
    x = 6,218.53

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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.