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Finding the Fourth Proportional to 9,878.91, 14,874.33 and 8,716.56

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Solution

The fourth proportional to 9,878.91, 14,874.33 and 8,716.56 is: 13,124.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,878.91 : 14,874.33 = 8,716.56 : x
  2. Step 2: Convert to fraction form
    9,878.91/14,874.33 = 8,716.56/x
  3. Step 3: Cross multiply
    9,878.91x = 14,874.33 × 8,716.56
  4. Step 4: Simplify right side
    9,878.91x = 129,652,989.90
  5. Step 5: Solve for x
    x = 129,652,989.90/9,878.91
  6. Step 6: Final answer
    x = 13,124.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.