Home / 13,579.28-18,738.24-8,275.76

Finding the Fourth Proportional to 13,579.28, 18,738.24 and 8,275.76

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Solution

The fourth proportional to 13,579.28, 18,738.24 and 8,275.76 is: 11,419.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.28 : 18,738.24 = 8,275.76 : x
  2. Step 2: Convert to fraction form
    13,579.28/18,738.24 = 8,275.76/x
  3. Step 3: Cross multiply
    13,579.28x = 18,738.24 × 8,275.76
  4. Step 4: Simplify right side
    13,579.28x = 155,073,177.06
  5. Step 5: Solve for x
    x = 155,073,177.06/13,579.28
  6. Step 6: Final answer
    x = 11,419.84

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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.