Home / 12,511.39-18,766.28-4,720

Finding the Fourth Proportional to 12,511.39, 18,766.28 and 4,720

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Solution

The fourth proportional to 12,511.39, 18,766.28 and 4,720 is: 7,079.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,511.39 : 18,766.28 = 4,720 : x
  2. Step 2: Convert to fraction form
    12,511.39/18,766.28 = 4,720/x
  3. Step 3: Cross multiply
    12,511.39x = 18,766.28 × 4,720
  4. Step 4: Simplify right side
    12,511.39x = 88,576,818
  5. Step 5: Solve for x
    x = 88,576,818/12,511.39
  6. Step 6: Final answer
    x = 7,079.69

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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.