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Finding the Fourth Proportional to 7,943.86, 11,913.50 and 3,200

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Solution

The fourth proportional to 7,943.86, 11,913.50 and 3,200 is: 4,799.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,943.86 : 11,913.50 = 3,200 : x
  2. Step 2: Convert to fraction form
    7,943.86/11,913.50 = 3,200/x
  3. Step 3: Cross multiply
    7,943.86x = 11,913.50 × 3,200
  4. Step 4: Simplify right side
    7,943.86x = 38,123,200
  5. Step 5: Solve for x
    x = 38,123,200/7,943.86
  6. Step 6: Final answer
    x = 4,799.08

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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.