Home / 20,225.19-27,911.71-11,272.75

Finding the Fourth Proportional to 20,225.19, 27,911.71 and 11,272.75

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Solution

The fourth proportional to 20,225.19, 27,911.71 and 11,272.75 is: 15,556.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.19 : 27,911.71 = 11,272.75 : x
  2. Step 2: Convert to fraction form
    20,225.19/27,911.71 = 11,272.75/x
  3. Step 3: Cross multiply
    20,225.19x = 27,911.71 × 11,272.75
  4. Step 4: Simplify right side
    20,225.19x = 314,641,728.90
  5. Step 5: Solve for x
    x = 314,641,728.90/20,225.19
  6. Step 6: Final answer
    x = 15,556.92

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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.