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Finding the Fourth Proportional to 11,454.95, 15,815.45 and 8,797.61

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Solution

The fourth proportional to 11,454.95, 15,815.45 and 8,797.61 is: 12,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,454.95 : 15,815.45 = 8,797.61 : x
  2. Step 2: Convert to fraction form
    11,454.95/15,815.45 = 8,797.61/x
  3. Step 3: Cross multiply
    11,454.95x = 15,815.45 × 8,797.61
  4. Step 4: Simplify right side
    11,454.95x = 139,138,161.07
  5. Step 5: Solve for x
    x = 139,138,161.07/11,454.95
  6. Step 6: Final answer
    x = 12,146.55

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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.