Home / 27,139.10-40,708.85-8,418.78

Finding the Fourth Proportional to 27,139.10, 40,708.85 and 8,418.78

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Solution

The fourth proportional to 27,139.10, 40,708.85 and 8,418.78 is: 12,628.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,139.10 : 40,708.85 = 8,418.78 : x
  2. Step 2: Convert to fraction form
    27,139.10/40,708.85 = 8,418.78/x
  3. Step 3: Cross multiply
    27,139.10x = 40,708.85 × 8,418.78
  4. Step 4: Simplify right side
    27,139.10x = 342,718,810.11
  5. Step 5: Solve for x
    x = 342,718,810.11/27,139.10
  6. Step 6: Final answer
    x = 12,628.23

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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.