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Finding the Fourth Proportional to 19,798.79, 29,688.90 and 11,481.17

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Solution

The fourth proportional to 19,798.79, 29,688.90 and 11,481.17 is: 17,216.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,798.79 : 29,688.90 = 11,481.17 : x
  2. Step 2: Convert to fraction form
    19,798.79/29,688.90 = 11,481.17/x
  3. Step 3: Cross multiply
    19,798.79x = 29,688.90 × 11,481.17
  4. Step 4: Simplify right side
    19,798.79x = 340,863,308.01
  5. Step 5: Solve for x
    x = 340,863,308.01/19,798.79
  6. Step 6: Final answer
    x = 17,216.37

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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.