Home / 10,885.90-15,021.78-6,105.49

Finding the Fourth Proportional to 10,885.90, 15,021.78 and 6,105.49

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Solution

The fourth proportional to 10,885.90, 15,021.78 and 6,105.49 is: 8,425.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,885.90 : 15,021.78 = 6,105.49 : x
  2. Step 2: Convert to fraction form
    10,885.90/15,021.78 = 6,105.49/x
  3. Step 3: Cross multiply
    10,885.90x = 15,021.78 × 6,105.49
  4. Step 4: Simplify right side
    10,885.90x = 91,715,327.57
  5. Step 5: Solve for x
    x = 91,715,327.57/10,885.90
  6. Step 6: Final answer
    x = 8,425.15

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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.