Home / 19,921.16-29,818.54-11,129.42

Finding the Fourth Proportional to 19,921.16, 29,818.54 and 11,129.42

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Solution

The fourth proportional to 19,921.16, 29,818.54 and 11,129.42 is: 16,658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.16 : 29,818.54 = 11,129.42 : x
  2. Step 2: Convert to fraction form
    19,921.16/29,818.54 = 11,129.42/x
  3. Step 3: Cross multiply
    19,921.16x = 29,818.54 × 11,129.42
  4. Step 4: Simplify right side
    19,921.16x = 331,862,999.80
  5. Step 5: Solve for x
    x = 331,862,999.80/19,921.16
  6. Step 6: Final answer
    x = 16,658.82

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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.