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Finding the Fourth Proportional to 8,607.75, 11,878.70 and 4,881.75

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Solution

The fourth proportional to 8,607.75, 11,878.70 and 4,881.75 is: 6,736.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.75 : 11,878.70 = 4,881.75 : x
  2. Step 2: Convert to fraction form
    8,607.75/11,878.70 = 4,881.75/x
  3. Step 3: Cross multiply
    8,607.75x = 11,878.70 × 4,881.75
  4. Step 4: Simplify right side
    8,607.75x = 57,988,819.32
  5. Step 5: Solve for x
    x = 57,988,819.32/8,607.75
  6. Step 6: Final answer
    x = 6,736.82

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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.