Home / 19,719.78-27,212.13-11,220.72

Finding the Fourth Proportional to 19,719.78, 27,212.13 and 11,220.72

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Solution

The fourth proportional to 19,719.78, 27,212.13 and 11,220.72 is: 15,483.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.78 : 27,212.13 = 11,220.72 : x
  2. Step 2: Convert to fraction form
    19,719.78/27,212.13 = 11,220.72/x
  3. Step 3: Cross multiply
    19,719.78x = 27,212.13 × 11,220.72
  4. Step 4: Simplify right side
    19,719.78x = 305,339,691.33
  5. Step 5: Solve for x
    x = 305,339,691.33/19,719.78
  6. Step 6: Final answer
    x = 15,483.93

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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.