Home / 19,781.28-27,290.52-12,711.60

Finding the Fourth Proportional to 19,781.28, 27,290.52 and 12,711.60

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Solution

The fourth proportional to 19,781.28, 27,290.52 and 12,711.60 is: 17,537.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.28 : 27,290.52 = 12,711.60 : x
  2. Step 2: Convert to fraction form
    19,781.28/27,290.52 = 12,711.60/x
  3. Step 3: Cross multiply
    19,781.28x = 27,290.52 × 12,711.60
  4. Step 4: Simplify right side
    19,781.28x = 346,906,174.03
  5. Step 5: Solve for x
    x = 346,906,174.03/19,781.28
  6. Step 6: Final answer
    x = 17,537.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.