Home / 21,265.60-31,915.68-8,119.84

Finding the Fourth Proportional to 21,265.60, 31,915.68 and 8,119.84

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Solution

The fourth proportional to 21,265.60, 31,915.68 and 8,119.84 is: 12,186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.60 : 31,915.68 = 8,119.84 : x
  2. Step 2: Convert to fraction form
    21,265.60/31,915.68 = 8,119.84/x
  3. Step 3: Cross multiply
    21,265.60x = 31,915.68 × 8,119.84
  4. Step 4: Simplify right side
    21,265.60x = 259,150,215.09
  5. Step 5: Solve for x
    x = 259,150,215.09/21,265.60
  6. Step 6: Final answer
    x = 12,186.36

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1.5x scale

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.