Home / 8,159.12-12,216.72-4,255.28

Finding the Fourth Proportional to 8,159.12, 12,216.72 and 4,255.28

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Solution

The fourth proportional to 8,159.12, 12,216.72 and 4,255.28 is: 6,371.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,159.12 : 12,216.72 = 4,255.28 : x
  2. Step 2: Convert to fraction form
    8,159.12/12,216.72 = 4,255.28/x
  3. Step 3: Cross multiply
    8,159.12x = 12,216.72 × 4,255.28
  4. Step 4: Simplify right side
    8,159.12x = 51,985,564.28
  5. Step 5: Solve for x
    x = 51,985,564.28/8,159.12
  6. Step 6: Final answer
    x = 6,371.47

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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.