Home / 18,686.40-25,732.80-15,122.40

Finding the Fourth Proportional to 18,686.40, 25,732.80 and 15,122.40

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Solution

The fourth proportional to 18,686.40, 25,732.80 and 15,122.40 is: 20,824.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.40 : 25,732.80 = 15,122.40 : x
  2. Step 2: Convert to fraction form
    18,686.40/25,732.80 = 15,122.40/x
  3. Step 3: Cross multiply
    18,686.40x = 25,732.80 × 15,122.40
  4. Step 4: Simplify right side
    18,686.40x = 389,141,694.72
  5. Step 5: Solve for x
    x = 389,141,694.72/18,686.40
  6. Step 6: Final answer
    x = 20,824.86

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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.