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Finding the Fourth Proportional to 26,811.20, 40,216.80 and 9,275.20

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Solution

The fourth proportional to 26,811.20, 40,216.80 and 9,275.20 is: 13,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,811.20 : 40,216.80 = 9,275.20 : x
  2. Step 2: Convert to fraction form
    26,811.20/40,216.80 = 9,275.20/x
  3. Step 3: Cross multiply
    26,811.20x = 40,216.80 × 9,275.20
  4. Step 4: Simplify right side
    26,811.20x = 373,018,863.36
  5. Step 5: Solve for x
    x = 373,018,863.36/26,811.20
  6. Step 6: Final answer
    x = 13,912.80

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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.