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Finding the Fourth Proportional to 8,612.66, 11,878.97 and 7,419.67

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Solution

The fourth proportional to 8,612.66, 11,878.97 and 7,419.67 is: 10,233.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.66 : 11,878.97 = 7,419.67 : x
  2. Step 2: Convert to fraction form
    8,612.66/11,878.97 = 7,419.67/x
  3. Step 3: Cross multiply
    8,612.66x = 11,878.97 × 7,419.67
  4. Step 4: Simplify right side
    8,612.66x = 88,137,970.54
  5. Step 5: Solve for x
    x = 88,137,970.54/8,612.66
  6. Step 6: Final answer
    x = 10,233.53

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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.