Home / 18,642.20-25,729.92-10,689.80

Finding the Fourth Proportional to 18,642.20, 25,729.92 and 10,689.80

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Solution

The fourth proportional to 18,642.20, 25,729.92 and 10,689.80 is: 14,754.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.20 : 25,729.92 = 10,689.80 : x
  2. Step 2: Convert to fraction form
    18,642.20/25,729.92 = 10,689.80/x
  3. Step 3: Cross multiply
    18,642.20x = 25,729.92 × 10,689.80
  4. Step 4: Simplify right side
    18,642.20x = 275,047,698.82
  5. Step 5: Solve for x
    x = 275,047,698.82/18,642.20
  6. Step 6: Final answer
    x = 14,754.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.