Home / 20,221.80-27,905.16-11,270.28

Finding the Fourth Proportional to 20,221.80, 27,905.16 and 11,270.28

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Solution

The fourth proportional to 20,221.80, 27,905.16 and 11,270.28 is: 15,552.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.80 : 27,905.16 = 11,270.28 : x
  2. Step 2: Convert to fraction form
    20,221.80/27,905.16 = 11,270.28/x
  3. Step 3: Cross multiply
    20,221.80x = 27,905.16 × 11,270.28
  4. Step 4: Simplify right side
    20,221.80x = 314,498,966.64
  5. Step 5: Solve for x
    x = 314,498,966.64/20,221.80
  6. Step 6: Final answer
    x = 15,552.47

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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.