Home / 20,245.61-27,938.75-11,171.05

Finding the Fourth Proportional to 20,245.61, 27,938.75 and 11,171.05

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Solution

The fourth proportional to 20,245.61, 27,938.75 and 11,171.05 is: 15,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.61 : 27,938.75 = 11,171.05 : x
  2. Step 2: Convert to fraction form
    20,245.61/27,938.75 = 11,171.05/x
  3. Step 3: Cross multiply
    20,245.61x = 27,938.75 × 11,171.05
  4. Step 4: Simplify right side
    20,245.61x = 312,105,117.33
  5. Step 5: Solve for x
    x = 312,105,117.33/20,245.61
  6. Step 6: Final answer
    x = 15,415.94

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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.