Home / 18,815.28-25,959.24-12,528.72

Finding the Fourth Proportional to 18,815.28, 25,959.24 and 12,528.72

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Solution

The fourth proportional to 18,815.28, 25,959.24 and 12,528.72 is: 17,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.28 : 25,959.24 = 12,528.72 : x
  2. Step 2: Convert to fraction form
    18,815.28/25,959.24 = 12,528.72/x
  3. Step 3: Cross multiply
    18,815.28x = 25,959.24 × 12,528.72
  4. Step 4: Simplify right side
    18,815.28x = 325,236,049.37
  5. Step 5: Solve for x
    x = 325,236,049.37/18,815.28
  6. Step 6: Final answer
    x = 17,285.74

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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.