Home / 15,057.28-20,778.24-8,682.40

Finding the Fourth Proportional to 15,057.28, 20,778.24 and 8,682.40

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Solution

The fourth proportional to 15,057.28, 20,778.24 and 8,682.40 is: 11,981.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.28 : 20,778.24 = 8,682.40 : x
  2. Step 2: Convert to fraction form
    15,057.28/20,778.24 = 8,682.40/x
  3. Step 3: Cross multiply
    15,057.28x = 20,778.24 × 8,682.40
  4. Step 4: Simplify right side
    15,057.28x = 180,404,990.98
  5. Step 5: Solve for x
    x = 180,404,990.98/15,057.28
  6. Step 6: Final answer
    x = 11,981.25

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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.