Home / 8,515.52-12,765.70-3,320.20

Finding the Fourth Proportional to 8,515.52, 12,765.70 and 3,320.20

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Solution

The fourth proportional to 8,515.52, 12,765.70 and 3,320.20 is: 4,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.52 : 12,765.70 = 3,320.20 : x
  2. Step 2: Convert to fraction form
    8,515.52/12,765.70 = 3,320.20/x
  3. Step 3: Cross multiply
    8,515.52x = 12,765.70 × 3,320.20
  4. Step 4: Simplify right side
    8,515.52x = 42,384,677.14
  5. Step 5: Solve for x
    x = 42,384,677.14/8,515.52
  6. Step 6: Final answer
    x = 4,977.34

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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.