Home / 8,540.86-12,819.29-5,260.36

Finding the Fourth Proportional to 8,540.86, 12,819.29 and 5,260.36

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Solution

The fourth proportional to 8,540.86, 12,819.29 and 5,260.36 is: 7,895.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.86 : 12,819.29 = 5,260.36 : x
  2. Step 2: Convert to fraction form
    8,540.86/12,819.29 = 5,260.36/x
  3. Step 3: Cross multiply
    8,540.86x = 12,819.29 × 5,260.36
  4. Step 4: Simplify right side
    8,540.86x = 67,434,080.34
  5. Step 5: Solve for x
    x = 67,434,080.34/8,540.86
  6. Step 6: Final answer
    x = 7,895.47

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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.