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Finding the Fourth Proportional to 8,628.69, 12,943.02 and 2,785.29

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Solution

The fourth proportional to 8,628.69, 12,943.02 and 2,785.29 is: 4,177.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.69 : 12,943.02 = 2,785.29 : x
  2. Step 2: Convert to fraction form
    8,628.69/12,943.02 = 2,785.29/x
  3. Step 3: Cross multiply
    8,628.69x = 12,943.02 × 2,785.29
  4. Step 4: Simplify right side
    8,628.69x = 36,050,064.18
  5. Step 5: Solve for x
    x = 36,050,064.18/8,628.69
  6. Step 6: Final answer
    x = 4,177.93

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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.