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Finding the Fourth Proportional to 21,958.60, 32,937.90 and 20,144.20

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Solution

The fourth proportional to 21,958.60, 32,937.90 and 20,144.20 is: 30,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.60 : 32,937.90 = 20,144.20 : x
  2. Step 2: Convert to fraction form
    21,958.60/32,937.90 = 20,144.20/x
  3. Step 3: Cross multiply
    21,958.60x = 32,937.90 × 20,144.20
  4. Step 4: Simplify right side
    21,958.60x = 663,507,645.18
  5. Step 5: Solve for x
    x = 663,507,645.18/21,958.60
  6. Step 6: Final answer
    x = 30,216.30

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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.