Home / 19,781.64-29,629.80-18,618.48

Finding the Fourth Proportional to 19,781.64, 29,629.80 and 18,618.48

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Solution

The fourth proportional to 19,781.64, 29,629.80 and 18,618.48 is: 27,887.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.64 : 29,629.80 = 18,618.48 : x
  2. Step 2: Convert to fraction form
    19,781.64/29,629.80 = 18,618.48/x
  3. Step 3: Cross multiply
    19,781.64x = 29,629.80 × 18,618.48
  4. Step 4: Simplify right side
    19,781.64x = 551,661,838.70
  5. Step 5: Solve for x
    x = 551,661,838.70/19,781.64
  6. Step 6: Final answer
    x = 27,887.57

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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.