Home / 10,228.88-15,310.32-5,291.72

Finding the Fourth Proportional to 10,228.88, 15,310.32 and 5,291.72

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Solution

The fourth proportional to 10,228.88, 15,310.32 and 5,291.72 is: 7,920.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,228.88 : 15,310.32 = 5,291.72 : x
  2. Step 2: Convert to fraction form
    10,228.88/15,310.32 = 5,291.72/x
  3. Step 3: Cross multiply
    10,228.88x = 15,310.32 × 5,291.72
  4. Step 4: Simplify right side
    10,228.88x = 81,017,926.55
  5. Step 5: Solve for x
    x = 81,017,926.55/10,228.88
  6. Step 6: Final answer
    x = 7,920.51

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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.