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Finding the Fourth Proportional to 26,615, 39,921.42 and 7,894.28

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Solution

The fourth proportional to 26,615, 39,921.42 and 7,894.28 is: 11,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,615 : 39,921.42 = 7,894.28 : x
  2. Step 2: Convert to fraction form
    26,615/39,921.42 = 7,894.28/x
  3. Step 3: Cross multiply
    26,615x = 39,921.42 × 7,894.28
  4. Step 4: Simplify right side
    26,615x = 315,150,867.48
  5. Step 5: Solve for x
    x = 315,150,867.48/26,615
  6. Step 6: Final answer
    x = 11,841.10

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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.