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Finding the Fourth Proportional to 19,025.20, 28,537.80 and 7,928.20

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Solution

The fourth proportional to 19,025.20, 28,537.80 and 7,928.20 is: 11,892.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,025.20 : 28,537.80 = 7,928.20 : x
  2. Step 2: Convert to fraction form
    19,025.20/28,537.80 = 7,928.20/x
  3. Step 3: Cross multiply
    19,025.20x = 28,537.80 × 7,928.20
  4. Step 4: Simplify right side
    19,025.20x = 226,253,385.96
  5. Step 5: Solve for x
    x = 226,253,385.96/19,025.20
  6. Step 6: Final answer
    x = 11,892.30

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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.