Home / 8,115.32-12,172.98-1,959.32

Finding the Fourth Proportional to 8,115.32, 12,172.98 and 1,959.32

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Solution

The fourth proportional to 8,115.32, 12,172.98 and 1,959.32 is: 2,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.32 : 12,172.98 = 1,959.32 : x
  2. Step 2: Convert to fraction form
    8,115.32/12,172.98 = 1,959.32/x
  3. Step 3: Cross multiply
    8,115.32x = 12,172.98 × 1,959.32
  4. Step 4: Simplify right side
    8,115.32x = 23,850,763.17
  5. Step 5: Solve for x
    x = 23,850,763.17/8,115.32
  6. Step 6: Final answer
    x = 2,938.98

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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.