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Finding the Fourth Proportional to 26,905.60, 40,358.40 and 21,067.20

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Solution

The fourth proportional to 26,905.60, 40,358.40 and 21,067.20 is: 31,600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,905.60 : 40,358.40 = 21,067.20 : x
  2. Step 2: Convert to fraction form
    26,905.60/40,358.40 = 21,067.20/x
  3. Step 3: Cross multiply
    26,905.60x = 40,358.40 × 21,067.20
  4. Step 4: Simplify right side
    26,905.60x = 850,238,484.48
  5. Step 5: Solve for x
    x = 850,238,484.48/26,905.60
  6. Step 6: Final answer
    x = 31,600.80

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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.