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Finding the Fourth Proportional to 21,861.20, 32,707.80 and 21,805.20

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Solution

The fourth proportional to 21,861.20, 32,707.80 and 21,805.20 is: 32,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.20 : 32,707.80 = 21,805.20 : x
  2. Step 2: Convert to fraction form
    21,861.20/32,707.80 = 21,805.20/x
  3. Step 3: Cross multiply
    21,861.20x = 32,707.80 × 21,805.20
  4. Step 4: Simplify right side
    21,861.20x = 713,200,120.56
  5. Step 5: Solve for x
    x = 713,200,120.56/21,861.20
  6. Step 6: Final answer
    x = 32,624.02

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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.