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Finding the Fourth Proportional to 8,868.10, 12,231.05 and 5,681.69

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Solution

The fourth proportional to 8,868.10, 12,231.05 and 5,681.69 is: 7,836.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,868.10 : 12,231.05 = 5,681.69 : x
  2. Step 2: Convert to fraction form
    8,868.10/12,231.05 = 5,681.69/x
  3. Step 3: Cross multiply
    8,868.10x = 12,231.05 × 5,681.69
  4. Step 4: Simplify right side
    8,868.10x = 69,493,079.26
  5. Step 5: Solve for x
    x = 69,493,079.26/8,868.10
  6. Step 6: Final answer
    x = 7,836.30

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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.