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Finding the Fourth Proportional to 15,479.84, 21,361.75 and 8,766.11

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Solution

The fourth proportional to 15,479.84, 21,361.75 and 8,766.11 is: 12,096.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.84 : 21,361.75 = 8,766.11 : x
  2. Step 2: Convert to fraction form
    15,479.84/21,361.75 = 8,766.11/x
  3. Step 3: Cross multiply
    15,479.84x = 21,361.75 × 8,766.11
  4. Step 4: Simplify right side
    15,479.84x = 187,259,481.78
  5. Step 5: Solve for x
    x = 187,259,481.78/15,479.84
  6. Step 6: Final answer
    x = 12,096.99

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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.