Home / 12,101.48-18,158.78-11,220.20

Finding the Fourth Proportional to 12,101.48, 18,158.78 and 11,220.20

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Solution

The fourth proportional to 12,101.48, 18,158.78 and 11,220.20 is: 16,836.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,101.48 : 18,158.78 = 11,220.20 : x
  2. Step 2: Convert to fraction form
    12,101.48/18,158.78 = 11,220.20/x
  3. Step 3: Cross multiply
    12,101.48x = 18,158.78 × 11,220.20
  4. Step 4: Simplify right side
    12,101.48x = 203,745,143.36
  5. Step 5: Solve for x
    x = 203,745,143.36/12,101.48
  6. Step 6: Final answer
    x = 16,836.38

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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.