Home / 25,785.20-38,678.28-20,653.04

Finding the Fourth Proportional to 25,785.20, 38,678.28 and 20,653.04

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Solution

The fourth proportional to 25,785.20, 38,678.28 and 20,653.04 is: 30,979.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,785.20 : 38,678.28 = 20,653.04 : x
  2. Step 2: Convert to fraction form
    25,785.20/38,678.28 = 20,653.04/x
  3. Step 3: Cross multiply
    25,785.20x = 38,678.28 × 20,653.04
  4. Step 4: Simplify right side
    25,785.20x = 798,824,063.97
  5. Step 5: Solve for x
    x = 798,824,063.97/25,785.20
  6. Step 6: Final answer
    x = 30,979.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.