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Finding the Fourth Proportional to 8,878.84, 12,215.07 and 8,632.80

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Solution

The fourth proportional to 8,878.84, 12,215.07 and 8,632.80 is: 11,876.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.84 : 12,215.07 = 8,632.80 : x
  2. Step 2: Convert to fraction form
    8,878.84/12,215.07 = 8,632.80/x
  3. Step 3: Cross multiply
    8,878.84x = 12,215.07 × 8,632.80
  4. Step 4: Simplify right side
    8,878.84x = 105,450,256.30
  5. Step 5: Solve for x
    x = 105,450,256.30/8,878.84
  6. Step 6: Final answer
    x = 11,876.58

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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.