Home / 8,540.10-12,815.28-3,609.36

Finding the Fourth Proportional to 8,540.10, 12,815.28 and 3,609.36

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Solution

The fourth proportional to 8,540.10, 12,815.28 and 3,609.36 is: 5,416.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.10 : 12,815.28 = 3,609.36 : x
  2. Step 2: Convert to fraction form
    8,540.10/12,815.28 = 3,609.36/x
  3. Step 3: Cross multiply
    8,540.10x = 12,815.28 × 3,609.36
  4. Step 4: Simplify right side
    8,540.10x = 46,254,959.02
  5. Step 5: Solve for x
    x = 46,254,959.02/8,540.10
  6. Step 6: Final answer
    x = 5,416.21

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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.