Home / 20,272.90-27,977.07-12,719.54

Finding the Fourth Proportional to 20,272.90, 27,977.07 and 12,719.54

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Solution

The fourth proportional to 20,272.90, 27,977.07 and 12,719.54 is: 17,553.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.90 : 27,977.07 = 12,719.54 : x
  2. Step 2: Convert to fraction form
    20,272.90/27,977.07 = 12,719.54/x
  3. Step 3: Cross multiply
    20,272.90x = 27,977.07 × 12,719.54
  4. Step 4: Simplify right side
    20,272.90x = 355,855,460.95
  5. Step 5: Solve for x
    x = 355,855,460.95/20,272.90
  6. Step 6: Final answer
    x = 17,553.26

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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.