Home / 10,428.63-15,638.22-6,479.75

Finding the Fourth Proportional to 10,428.63, 15,638.22 and 6,479.75

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Solution

The fourth proportional to 10,428.63, 15,638.22 and 6,479.75 is: 9,716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,428.63 : 15,638.22 = 6,479.75 : x
  2. Step 2: Convert to fraction form
    10,428.63/15,638.22 = 6,479.75/x
  3. Step 3: Cross multiply
    10,428.63x = 15,638.22 × 6,479.75
  4. Step 4: Simplify right side
    10,428.63x = 101,331,677.85
  5. Step 5: Solve for x
    x = 101,331,677.85/10,428.63
  6. Step 6: Final answer
    x = 9,716.68

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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.