Home / 7,618.58-11,428.80-2,687.21

Finding the Fourth Proportional to 7,618.58, 11,428.80 and 2,687.21

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Solution

The fourth proportional to 7,618.58, 11,428.80 and 2,687.21 is: 4,031.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.58 : 11,428.80 = 2,687.21 : x
  2. Step 2: Convert to fraction form
    7,618.58/11,428.80 = 2,687.21/x
  3. Step 3: Cross multiply
    7,618.58x = 11,428.80 × 2,687.21
  4. Step 4: Simplify right side
    7,618.58x = 30,711,572.21
  5. Step 5: Solve for x
    x = 30,711,572.21/7,618.58
  6. Step 6: Final answer
    x = 4,031.14

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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.