Home / 15,414.28-21,271.73-8,340.68

Finding the Fourth Proportional to 15,414.28, 21,271.73 and 8,340.68

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Solution

The fourth proportional to 15,414.28, 21,271.73 and 8,340.68 is: 11,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,414.28 : 21,271.73 = 8,340.68 : x
  2. Step 2: Convert to fraction form
    15,414.28/21,271.73 = 8,340.68/x
  3. Step 3: Cross multiply
    15,414.28x = 21,271.73 × 8,340.68
  4. Step 4: Simplify right side
    15,414.28x = 177,420,704.45
  5. Step 5: Solve for x
    x = 177,420,704.45/15,414.28
  6. Step 6: Final answer
    x = 11,510.15

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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.