Home / 5,115-7,674.30-2,519.76

Finding the Fourth Proportional to 5,115, 7,674.30 and 2,519.76

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Solution

The fourth proportional to 5,115, 7,674.30 and 2,519.76 is: 3,780.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115 : 7,674.30 = 2,519.76 : x
  2. Step 2: Convert to fraction form
    5,115/7,674.30 = 2,519.76/x
  3. Step 3: Cross multiply
    5,115x = 7,674.30 × 2,519.76
  4. Step 4: Simplify right side
    5,115x = 19,337,394.17
  5. Step 5: Solve for x
    x = 19,337,394.17/5,115
  6. Step 6: Final answer
    x = 3,780.53

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1.5x scale

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.