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Finding the Fourth Proportional to 8,786.61, 13,091.19 and 8,368.65

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Solution

The fourth proportional to 8,786.61, 13,091.19 and 8,368.65 is: 12,468.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.61 : 13,091.19 = 8,368.65 : x
  2. Step 2: Convert to fraction form
    8,786.61/13,091.19 = 8,368.65/x
  3. Step 3: Cross multiply
    8,786.61x = 13,091.19 × 8,368.65
  4. Step 4: Simplify right side
    8,786.61x = 109,555,555.81
  5. Step 5: Solve for x
    x = 109,555,555.81/8,786.61
  6. Step 6: Final answer
    x = 12,468.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.