Home / 15,243.96-20,910.75-15,105.72

Finding the Fourth Proportional to 15,243.96, 20,910.75 and 15,105.72

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Solution

The fourth proportional to 15,243.96, 20,910.75 and 15,105.72 is: 20,721.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,243.96 : 20,910.75 = 15,105.72 : x
  2. Step 2: Convert to fraction form
    15,243.96/20,910.75 = 15,105.72/x
  3. Step 3: Cross multiply
    15,243.96x = 20,910.75 × 15,105.72
  4. Step 4: Simplify right side
    15,243.96x = 315,871,934.49
  5. Step 5: Solve for x
    x = 315,871,934.49/15,243.96
  6. Step 6: Final answer
    x = 20,721.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.