Home / 20,125.78-27,774.48-11,173.40

Finding the Fourth Proportional to 20,125.78, 27,774.48 and 11,173.40

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Solution

The fourth proportional to 20,125.78, 27,774.48 and 11,173.40 is: 15,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.78 : 27,774.48 = 11,173.40 : x
  2. Step 2: Convert to fraction form
    20,125.78/27,774.48 = 11,173.40/x
  3. Step 3: Cross multiply
    20,125.78x = 27,774.48 × 11,173.40
  4. Step 4: Simplify right side
    20,125.78x = 310,335,374.83
  5. Step 5: Solve for x
    x = 310,335,374.83/20,125.78
  6. Step 6: Final answer
    x = 15,419.79

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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.