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Finding the Fourth Proportional to 27,419.70, 41,129.55 and 20,858.70

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Solution

The fourth proportional to 27,419.70, 41,129.55 and 20,858.70 is: 31,288.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,419.70 : 41,129.55 = 20,858.70 : x
  2. Step 2: Convert to fraction form
    27,419.70/41,129.55 = 20,858.70/x
  3. Step 3: Cross multiply
    27,419.70x = 41,129.55 × 20,858.70
  4. Step 4: Simplify right side
    27,419.70x = 857,908,944.59
  5. Step 5: Solve for x
    x = 857,908,944.59/27,419.70
  6. Step 6: Final answer
    x = 31,288.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.