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Finding the Fourth Proportional to 5,520, 8,281.28 and 1,872

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Solution

The fourth proportional to 5,520, 8,281.28 and 1,872 is: 2,808.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,520 : 8,281.28 = 1,872 : x
  2. Step 2: Convert to fraction form
    5,520/8,281.28 = 1,872/x
  3. Step 3: Cross multiply
    5,520x = 8,281.28 × 1,872
  4. Step 4: Simplify right side
    5,520x = 15,502,556.16
  5. Step 5: Solve for x
    x = 15,502,556.16/5,520
  6. Step 6: Final answer
    x = 2,808.43

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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.