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Finding the Fourth Proportional to 8,785.11, 13,146.87 and 7,205.61

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Solution

The fourth proportional to 8,785.11, 13,146.87 and 7,205.61 is: 10,783.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.11 : 13,146.87 = 7,205.61 : x
  2. Step 2: Convert to fraction form
    8,785.11/13,146.87 = 7,205.61/x
  3. Step 3: Cross multiply
    8,785.11x = 13,146.87 × 7,205.61
  4. Step 4: Simplify right side
    8,785.11x = 94,731,217.94
  5. Step 5: Solve for x
    x = 94,731,217.94/8,785.11
  6. Step 6: Final answer
    x = 10,783.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.