Home / 20,208.11-27,888.05-11,255.61

Finding the Fourth Proportional to 20,208.11, 27,888.05 and 11,255.61

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Solution

The fourth proportional to 20,208.11, 27,888.05 and 11,255.61 is: 15,533.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,208.11 : 27,888.05 = 11,255.61 : x
  2. Step 2: Convert to fraction form
    20,208.11/27,888.05 = 11,255.61/x
  3. Step 3: Cross multiply
    20,208.11x = 27,888.05 × 11,255.61
  4. Step 4: Simplify right side
    20,208.11x = 313,897,014.46
  5. Step 5: Solve for x
    x = 313,897,014.46/20,208.11
  6. Step 6: Final answer
    x = 15,533.22

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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.