Home / 21,871.96-32,780.24-13,971.44

Finding the Fourth Proportional to 21,871.96, 32,780.24 and 13,971.44

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Solution

The fourth proportional to 21,871.96, 32,780.24 and 13,971.44 is: 20,939.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.96 : 32,780.24 = 13,971.44 : x
  2. Step 2: Convert to fraction form
    21,871.96/32,780.24 = 13,971.44/x
  3. Step 3: Cross multiply
    21,871.96x = 32,780.24 × 13,971.44
  4. Step 4: Simplify right side
    21,871.96x = 457,987,156.35
  5. Step 5: Solve for x
    x = 457,987,156.35/21,871.96
  6. Step 6: Final answer
    x = 20,939.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.