Home / 8,412.29-12,618.79-3,146.78

Finding the Fourth Proportional to 8,412.29, 12,618.79 and 3,146.78

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Solution

The fourth proportional to 8,412.29, 12,618.79 and 3,146.78 is: 4,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.29 : 12,618.79 = 3,146.78 : x
  2. Step 2: Convert to fraction form
    8,412.29/12,618.79 = 3,146.78/x
  3. Step 3: Cross multiply
    8,412.29x = 12,618.79 × 3,146.78
  4. Step 4: Simplify right side
    8,412.29x = 39,708,556.00
  5. Step 5: Solve for x
    x = 39,708,556.00/8,412.29
  6. Step 6: Final answer
    x = 4,720.30

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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.