Home / 21,728.20-32,543.70-18,812.20

Finding the Fourth Proportional to 21,728.20, 32,543.70 and 18,812.20

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Solution

The fourth proportional to 21,728.20, 32,543.70 and 18,812.20 is: 28,176.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.20 : 32,543.70 = 18,812.20 : x
  2. Step 2: Convert to fraction form
    21,728.20/32,543.70 = 18,812.20/x
  3. Step 3: Cross multiply
    21,728.20x = 32,543.70 × 18,812.20
  4. Step 4: Simplify right side
    21,728.20x = 612,218,593.14
  5. Step 5: Solve for x
    x = 612,218,593.14/21,728.20
  6. Step 6: Final answer
    x = 28,176.22

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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.