Home / 21,174.05-31,781.60-11,320.26

Finding the Fourth Proportional to 21,174.05, 31,781.60 and 11,320.26

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Solution

The fourth proportional to 21,174.05, 31,781.60 and 11,320.26 is: 16,991.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.05 : 31,781.60 = 11,320.26 : x
  2. Step 2: Convert to fraction form
    21,174.05/31,781.60 = 11,320.26/x
  3. Step 3: Cross multiply
    21,174.05x = 31,781.60 × 11,320.26
  4. Step 4: Simplify right side
    21,174.05x = 359,775,918.61
  5. Step 5: Solve for x
    x = 359,775,918.61/21,174.05
  6. Step 6: Final answer
    x = 16,991.36

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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.