Home / 21,721.20-32,581.80-11,331.60

Finding the Fourth Proportional to 21,721.20, 32,581.80 and 11,331.60

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Solution

The fourth proportional to 21,721.20, 32,581.80 and 11,331.60 is: 16,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.20 : 32,581.80 = 11,331.60 : x
  2. Step 2: Convert to fraction form
    21,721.20/32,581.80 = 11,331.60/x
  3. Step 3: Cross multiply
    21,721.20x = 32,581.80 × 11,331.60
  4. Step 4: Simplify right side
    21,721.20x = 369,203,924.88
  5. Step 5: Solve for x
    x = 369,203,924.88/21,721.20
  6. Step 6: Final answer
    x = 16,997.40

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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.