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Finding the Fourth Proportional to 21,354.60, 32,028.60 and 7,311.40

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Solution

The fourth proportional to 21,354.60, 32,028.60 and 7,311.40 is: 10,965.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.60 : 32,028.60 = 7,311.40 : x
  2. Step 2: Convert to fraction form
    21,354.60/32,028.60 = 7,311.40/x
  3. Step 3: Cross multiply
    21,354.60x = 32,028.60 × 7,311.40
  4. Step 4: Simplify right side
    21,354.60x = 234,173,906.04
  5. Step 5: Solve for x
    x = 234,173,906.04/21,354.60
  6. Step 6: Final answer
    x = 10,965.97

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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.