Home / 8,780.18-13,172.35-2,540.34

Finding the Fourth Proportional to 8,780.18, 13,172.35 and 2,540.34

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Solution

The fourth proportional to 8,780.18, 13,172.35 and 2,540.34 is: 3,811.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.18 : 13,172.35 = 2,540.34 : x
  2. Step 2: Convert to fraction form
    8,780.18/13,172.35 = 2,540.34/x
  3. Step 3: Cross multiply
    8,780.18x = 13,172.35 × 2,540.34
  4. Step 4: Simplify right side
    8,780.18x = 33,462,201.82
  5. Step 5: Solve for x
    x = 33,462,201.82/8,780.18
  6. Step 6: Final answer
    x = 3,811.11

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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.