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Finding the Fourth Proportional to 7,671.86, 11,500.05 and 2,988.94

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Solution

The fourth proportional to 7,671.86, 11,500.05 and 2,988.94 is: 4,480.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,671.86 : 11,500.05 = 2,988.94 : x
  2. Step 2: Convert to fraction form
    7,671.86/11,500.05 = 2,988.94/x
  3. Step 3: Cross multiply
    7,671.86x = 11,500.05 × 2,988.94
  4. Step 4: Simplify right side
    7,671.86x = 34,372,959.45
  5. Step 5: Solve for x
    x = 34,372,959.45/7,671.86
  6. Step 6: Final answer
    x = 4,480.39

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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.