Home / 8,115.12-12,172.80-3,498

Finding the Fourth Proportional to 8,115.12, 12,172.80 and 3,498

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Solution

The fourth proportional to 8,115.12, 12,172.80 and 3,498 is: 5,247.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.12 : 12,172.80 = 3,498 : x
  2. Step 2: Convert to fraction form
    8,115.12/12,172.80 = 3,498/x
  3. Step 3: Cross multiply
    8,115.12x = 12,172.80 × 3,498
  4. Step 4: Simplify right side
    8,115.12x = 42,580,454.40
  5. Step 5: Solve for x
    x = 42,580,454.40/8,115.12
  6. Step 6: Final answer
    x = 5,247.05

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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.