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Finding the Fourth Proportional to 7,888.80, 10,961.25 and 7,806.54

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Solution

The fourth proportional to 7,888.80, 10,961.25 and 7,806.54 is: 10,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.80 : 10,961.25 = 7,806.54 : x
  2. Step 2: Convert to fraction form
    7,888.80/10,961.25 = 7,806.54/x
  3. Step 3: Cross multiply
    7,888.80x = 10,961.25 × 7,806.54
  4. Step 4: Simplify right side
    7,888.80x = 85,569,436.58
  5. Step 5: Solve for x
    x = 85,569,436.58/7,888.80
  6. Step 6: Final answer
    x = 10,846.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.