Home / 20,124.78-27,773.10-11,172.40

Finding the Fourth Proportional to 20,124.78, 27,773.10 and 11,172.40

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Solution

The fourth proportional to 20,124.78, 27,773.10 and 11,172.40 is: 15,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.78 : 27,773.10 = 11,172.40 : x
  2. Step 2: Convert to fraction form
    20,124.78/27,773.10 = 11,172.40/x
  3. Step 3: Cross multiply
    20,124.78x = 27,773.10 × 11,172.40
  4. Step 4: Simplify right side
    20,124.78x = 310,292,182.44
  5. Step 5: Solve for x
    x = 310,292,182.44/20,124.78
  6. Step 6: Final answer
    x = 15,418.41

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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.