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Finding the Fourth Proportional to 19,825.54, 29,728.90 and 11,508.11

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Solution

The fourth proportional to 19,825.54, 29,728.90 and 11,508.11 is: 17,256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,825.54 : 29,728.90 = 11,508.11 : x
  2. Step 2: Convert to fraction form
    19,825.54/29,728.90 = 11,508.11/x
  3. Step 3: Cross multiply
    19,825.54x = 29,728.90 × 11,508.11
  4. Step 4: Simplify right side
    19,825.54x = 342,123,308.13
  5. Step 5: Solve for x
    x = 342,123,308.13/19,825.54
  6. Step 6: Final answer
    x = 17,256.69

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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.