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Finding the Fourth Proportional to 10,878.84, 15,005.66 and 8,516.88

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Solution

The fourth proportional to 10,878.84, 15,005.66 and 8,516.88 is: 11,747.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.84 : 15,005.66 = 8,516.88 : x
  2. Step 2: Convert to fraction form
    10,878.84/15,005.66 = 8,516.88/x
  3. Step 3: Cross multiply
    10,878.84x = 15,005.66 × 8,516.88
  4. Step 4: Simplify right side
    10,878.84x = 127,801,362.96
  5. Step 5: Solve for x
    x = 127,801,362.96/10,878.84
  6. Step 6: Final answer
    x = 11,747.70

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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.