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Finding the Fourth Proportional to 8,683.72, 12,966.63 and 6,908.87

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Solution

The fourth proportional to 8,683.72, 12,966.63 and 6,908.87 is: 10,316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,683.72 : 12,966.63 = 6,908.87 : x
  2. Step 2: Convert to fraction form
    8,683.72/12,966.63 = 6,908.87/x
  3. Step 3: Cross multiply
    8,683.72x = 12,966.63 × 6,908.87
  4. Step 4: Simplify right side
    8,683.72x = 89,584,761.01
  5. Step 5: Solve for x
    x = 89,584,761.01/8,683.72
  6. Step 6: Final answer
    x = 10,316.40

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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.