Home / 21,982.90-30,336.96-13,489.71

Finding the Fourth Proportional to 21,982.90, 30,336.96 and 13,489.71

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Solution

The fourth proportional to 21,982.90, 30,336.96 and 13,489.71 is: 18,616.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.90 : 30,336.96 = 13,489.71 : x
  2. Step 2: Convert to fraction form
    21,982.90/30,336.96 = 13,489.71/x
  3. Step 3: Cross multiply
    21,982.90x = 30,336.96 × 13,489.71
  4. Step 4: Simplify right side
    21,982.90x = 409,236,902.25
  5. Step 5: Solve for x
    x = 409,236,902.25/21,982.90
  6. Step 6: Final answer
    x = 18,616.15

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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.