Home / 5,780.20-7,972.50-3,685

Finding the Fourth Proportional to 5,780.20, 7,972.50 and 3,685

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Solution

The fourth proportional to 5,780.20, 7,972.50 and 3,685 is: 5,082.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,780.20 : 7,972.50 = 3,685 : x
  2. Step 2: Convert to fraction form
    5,780.20/7,972.50 = 3,685/x
  3. Step 3: Cross multiply
    5,780.20x = 7,972.50 × 3,685
  4. Step 4: Simplify right side
    5,780.20x = 29,378,662.50
  5. Step 5: Solve for x
    x = 29,378,662.50/5,780.20
  6. Step 6: Final answer
    x = 5,082.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.