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Finding the Fourth Proportional to 18,744.90, 28,128.15 and 7,059.30

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Solution

The fourth proportional to 18,744.90, 28,128.15 and 7,059.30 is: 10,593.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.90 : 28,128.15 = 7,059.30 : x
  2. Step 2: Convert to fraction form
    18,744.90/28,128.15 = 7,059.30/x
  3. Step 3: Cross multiply
    18,744.90x = 28,128.15 × 7,059.30
  4. Step 4: Simplify right side
    18,744.90x = 198,565,049.30
  5. Step 5: Solve for x
    x = 198,565,049.30/18,744.90
  6. Step 6: Final answer
    x = 10,593.02

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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.