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Finding the Fourth Proportional to 8,681.72, 12,963.65 and 6,906.87

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Solution

The fourth proportional to 8,681.72, 12,963.65 and 6,906.87 is: 10,313.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.72 : 12,963.65 = 6,906.87 : x
  2. Step 2: Convert to fraction form
    8,681.72/12,963.65 = 6,906.87/x
  3. Step 3: Cross multiply
    8,681.72x = 12,963.65 × 6,906.87
  4. Step 4: Simplify right side
    8,681.72x = 89,538,210.74
  5. Step 5: Solve for x
    x = 89,538,210.74/8,681.72
  6. Step 6: Final answer
    x = 10,313.42

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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.