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Finding the Fourth Proportional to 11,902.95, 16,418.77 and 7,869.76

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Solution

The fourth proportional to 11,902.95, 16,418.77 and 7,869.76 is: 10,855.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,902.95 : 16,418.77 = 7,869.76 : x
  2. Step 2: Convert to fraction form
    11,902.95/16,418.77 = 7,869.76/x
  3. Step 3: Cross multiply
    11,902.95x = 16,418.77 × 7,869.76
  4. Step 4: Simplify right side
    11,902.95x = 129,211,718.67
  5. Step 5: Solve for x
    x = 129,211,718.67/11,902.95
  6. Step 6: Final answer
    x = 10,855.44

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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.