Home / 21,218.52-29,298.78-18,976.44

Finding the Fourth Proportional to 21,218.52, 29,298.78 and 18,976.44

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Solution

The fourth proportional to 21,218.52, 29,298.78 and 18,976.44 is: 26,202.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.52 : 29,298.78 = 18,976.44 : x
  2. Step 2: Convert to fraction form
    21,218.52/29,298.78 = 18,976.44/x
  3. Step 3: Cross multiply
    21,218.52x = 29,298.78 × 18,976.44
  4. Step 4: Simplify right side
    21,218.52x = 555,986,540.74
  5. Step 5: Solve for x
    x = 555,986,540.74/21,218.52
  6. Step 6: Final answer
    x = 26,202.89

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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.