Home / 8,540.30-12,785.54-5,243.40

Finding the Fourth Proportional to 8,540.30, 12,785.54 and 5,243.40

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Solution

The fourth proportional to 8,540.30, 12,785.54 and 5,243.40 is: 7,849.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.30 : 12,785.54 = 5,243.40 : x
  2. Step 2: Convert to fraction form
    8,540.30/12,785.54 = 5,243.40/x
  3. Step 3: Cross multiply
    8,540.30x = 12,785.54 × 5,243.40
  4. Step 4: Simplify right side
    8,540.30x = 67,039,700.44
  5. Step 5: Solve for x
    x = 67,039,700.44/8,540.30
  6. Step 6: Final answer
    x = 7,849.81

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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.