Home / 20,772.08-31,122.66-11,419.93

Finding the Fourth Proportional to 20,772.08, 31,122.66 and 11,419.93

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Solution

The fourth proportional to 20,772.08, 31,122.66 and 11,419.93 is: 17,110.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.08 : 31,122.66 = 11,419.93 : x
  2. Step 2: Convert to fraction form
    20,772.08/31,122.66 = 11,419.93/x
  3. Step 3: Cross multiply
    20,772.08x = 31,122.66 × 11,419.93
  4. Step 4: Simplify right side
    20,772.08x = 355,418,443.00
  5. Step 5: Solve for x
    x = 355,418,443.00/20,772.08
  6. Step 6: Final answer
    x = 17,110.40

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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.