Home / 8,428.95-12,634.53-2,805.11

Finding the Fourth Proportional to 8,428.95, 12,634.53 and 2,805.11

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Solution

The fourth proportional to 8,428.95, 12,634.53 and 2,805.11 is: 4,204.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.95 : 12,634.53 = 2,805.11 : x
  2. Step 2: Convert to fraction form
    8,428.95/12,634.53 = 2,805.11/x
  3. Step 3: Cross multiply
    8,428.95x = 12,634.53 × 2,805.11
  4. Step 4: Simplify right side
    8,428.95x = 35,441,243.80
  5. Step 5: Solve for x
    x = 35,441,243.80/8,428.95
  6. Step 6: Final answer
    x = 4,204.70

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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.