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Finding the Fourth Proportional to 25,346.92, 34,991.22 and 15,920.68

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Solution

The fourth proportional to 25,346.92, 34,991.22 and 15,920.68 is: 21,978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,346.92 : 34,991.22 = 15,920.68 : x
  2. Step 2: Convert to fraction form
    25,346.92/34,991.22 = 15,920.68/x
  3. Step 3: Cross multiply
    25,346.92x = 34,991.22 × 15,920.68
  4. Step 4: Simplify right side
    25,346.92x = 557,084,016.43
  5. Step 5: Solve for x
    x = 557,084,016.43/25,346.92
  6. Step 6: Final answer
    x = 21,978.37

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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.