Home / 21,972.20-30,333.30-13,029.80

Finding the Fourth Proportional to 21,972.20, 30,333.30 and 13,029.80

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Solution

The fourth proportional to 21,972.20, 30,333.30 and 13,029.80 is: 17,988.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.20 : 30,333.30 = 13,029.80 : x
  2. Step 2: Convert to fraction form
    21,972.20/30,333.30 = 13,029.80/x
  3. Step 3: Cross multiply
    21,972.20x = 30,333.30 × 13,029.80
  4. Step 4: Simplify right side
    21,972.20x = 395,236,832.34
  5. Step 5: Solve for x
    x = 395,236,832.34/21,972.20
  6. Step 6: Final answer
    x = 17,988.04

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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.