Home / 21,087.60-31,660.20-10,706.64

Finding the Fourth Proportional to 21,087.60, 31,660.20 and 10,706.64

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Solution

The fourth proportional to 21,087.60, 31,660.20 and 10,706.64 is: 16,074.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.60 : 31,660.20 = 10,706.64 : x
  2. Step 2: Convert to fraction form
    21,087.60/31,660.20 = 10,706.64/x
  3. Step 3: Cross multiply
    21,087.60x = 31,660.20 × 10,706.64
  4. Step 4: Simplify right side
    21,087.60x = 338,974,363.73
  5. Step 5: Solve for x
    x = 338,974,363.73/21,087.60
  6. Step 6: Final answer
    x = 16,074.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.