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Finding the Fourth Proportional to 7,876.76, 10,869.36 and 4,339.76

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Solution

The fourth proportional to 7,876.76, 10,869.36 and 4,339.76 is: 5,988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.76 : 10,869.36 = 4,339.76 : x
  2. Step 2: Convert to fraction form
    7,876.76/10,869.36 = 4,339.76/x
  3. Step 3: Cross multiply
    7,876.76x = 10,869.36 × 4,339.76
  4. Step 4: Simplify right side
    7,876.76x = 47,170,413.75
  5. Step 5: Solve for x
    x = 47,170,413.75/7,876.76
  6. Step 6: Final answer
    x = 5,988.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.