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Finding the Fourth Proportional to 8,618.86, 11,895.12 and 5,260.95

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Solution

The fourth proportional to 8,618.86, 11,895.12 and 5,260.95 is: 7,260.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.86 : 11,895.12 = 5,260.95 : x
  2. Step 2: Convert to fraction form
    8,618.86/11,895.12 = 5,260.95/x
  3. Step 3: Cross multiply
    8,618.86x = 11,895.12 × 5,260.95
  4. Step 4: Simplify right side
    8,618.86x = 62,579,631.56
  5. Step 5: Solve for x
    x = 62,579,631.56/8,618.86
  6. Step 6: Final answer
    x = 7,260.78

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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.