Home / 20,220.10-27,997.05-19,831.30

Finding the Fourth Proportional to 20,220.10, 27,997.05 and 19,831.30

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Solution

The fourth proportional to 20,220.10, 27,997.05 and 19,831.30 is: 27,458.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.10 : 27,997.05 = 19,831.30 : x
  2. Step 2: Convert to fraction form
    20,220.10/27,997.05 = 19,831.30/x
  3. Step 3: Cross multiply
    20,220.10x = 27,997.05 × 19,831.30
  4. Step 4: Simplify right side
    20,220.10x = 555,217,897.67
  5. Step 5: Solve for x
    x = 555,217,897.67/20,220.10
  6. Step 6: Final answer
    x = 27,458.71

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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.