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Finding the Fourth Proportional to 19,889.66, 27,449.48 and 10,938.74

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Solution

The fourth proportional to 19,889.66, 27,449.48 and 10,938.74 is: 15,096.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.66 : 27,449.48 = 10,938.74 : x
  2. Step 2: Convert to fraction form
    19,889.66/27,449.48 = 10,938.74/x
  3. Step 3: Cross multiply
    19,889.66x = 27,449.48 × 10,938.74
  4. Step 4: Simplify right side
    19,889.66x = 300,262,724.86
  5. Step 5: Solve for x
    x = 300,262,724.86/19,889.66
  6. Step 6: Final answer
    x = 15,096.42

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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.