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Finding the Fourth Proportional to 8,871.74, 12,243.86 and 6,629.72

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Solution

The fourth proportional to 8,871.74, 12,243.86 and 6,629.72 is: 9,149.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.74 : 12,243.86 = 6,629.72 : x
  2. Step 2: Convert to fraction form
    8,871.74/12,243.86 = 6,629.72/x
  3. Step 3: Cross multiply
    8,871.74x = 12,243.86 × 6,629.72
  4. Step 4: Simplify right side
    8,871.74x = 81,173,397.32
  5. Step 5: Solve for x
    x = 81,173,397.32/8,871.74
  6. Step 6: Final answer
    x = 9,149.66

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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.