Home / 10,212.80-15,307.92-5,282.72

Finding the Fourth Proportional to 10,212.80, 15,307.92 and 5,282.72

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Solution

The fourth proportional to 10,212.80, 15,307.92 and 5,282.72 is: 7,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,212.80 : 15,307.92 = 5,282.72 : x
  2. Step 2: Convert to fraction form
    10,212.80/15,307.92 = 5,282.72/x
  3. Step 3: Cross multiply
    10,212.80x = 15,307.92 × 5,282.72
  4. Step 4: Simplify right side
    10,212.80x = 80,867,455.14
  5. Step 5: Solve for x
    x = 80,867,455.14/10,212.80
  6. Step 6: Final answer
    x = 7,918.25

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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.