Home / 21,971.35-30,321.85-13,016.95

Finding the Fourth Proportional to 21,971.35, 30,321.85 and 13,016.95

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Solution

The fourth proportional to 21,971.35, 30,321.85 and 13,016.95 is: 17,964.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.35 : 30,321.85 = 13,016.95 : x
  2. Step 2: Convert to fraction form
    21,971.35/30,321.85 = 13,016.95/x
  3. Step 3: Cross multiply
    21,971.35x = 30,321.85 × 13,016.95
  4. Step 4: Simplify right side
    21,971.35x = 394,697,853.75
  5. Step 5: Solve for x
    x = 394,697,853.75/21,971.35
  6. Step 6: Final answer
    x = 17,964.21

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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.