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Finding the Fourth Proportional to 9,906.95, 14,878.92 and 8,721.41

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Solution

The fourth proportional to 9,906.95, 14,878.92 and 8,721.41 is: 13,098.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,906.95 : 14,878.92 = 8,721.41 : x
  2. Step 2: Convert to fraction form
    9,906.95/14,878.92 = 8,721.41/x
  3. Step 3: Cross multiply
    9,906.95x = 14,878.92 × 8,721.41
  4. Step 4: Simplify right side
    9,906.95x = 129,765,087.28
  5. Step 5: Solve for x
    x = 129,765,087.28/9,906.95
  6. Step 6: Final answer
    x = 13,098.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.