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Finding the Fourth Proportional to 19,662.72, 27,132.80 and 11,278.72

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Solution

The fourth proportional to 19,662.72, 27,132.80 and 11,278.72 is: 15,563.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,662.72 : 27,132.80 = 11,278.72 : x
  2. Step 2: Convert to fraction form
    19,662.72/27,132.80 = 11,278.72/x
  3. Step 3: Cross multiply
    19,662.72x = 27,132.80 × 11,278.72
  4. Step 4: Simplify right side
    19,662.72x = 306,023,254.02
  5. Step 5: Solve for x
    x = 306,023,254.02/19,662.72
  6. Step 6: Final answer
    x = 15,563.63

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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.