Home / 8,124.10-12,181.20-3,187.78

Finding the Fourth Proportional to 8,124.10, 12,181.20 and 3,187.78

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Solution

The fourth proportional to 8,124.10, 12,181.20 and 3,187.78 is: 4,779.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,124.10 : 12,181.20 = 3,187.78 : x
  2. Step 2: Convert to fraction form
    8,124.10/12,181.20 = 3,187.78/x
  3. Step 3: Cross multiply
    8,124.10x = 12,181.20 × 3,187.78
  4. Step 4: Simplify right side
    8,124.10x = 38,830,985.74
  5. Step 5: Solve for x
    x = 38,830,985.74/8,124.10
  6. Step 6: Final answer
    x = 4,779.73

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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.