Home / 21,724.34-29,982.78-13,767.28

Finding the Fourth Proportional to 21,724.34, 29,982.78 and 13,767.28

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Solution

The fourth proportional to 21,724.34, 29,982.78 and 13,767.28 is: 19,000.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724.34 : 29,982.78 = 13,767.28 : x
  2. Step 2: Convert to fraction form
    21,724.34/29,982.78 = 13,767.28/x
  3. Step 3: Cross multiply
    21,724.34x = 29,982.78 × 13,767.28
  4. Step 4: Simplify right side
    21,724.34x = 412,781,327.44
  5. Step 5: Solve for x
    x = 412,781,327.44/21,724.34
  6. Step 6: Final answer
    x = 19,000.87

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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.