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Finding the Fourth Proportional to 18,720.52, 28,080.87 and 7,627.31

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Solution

The fourth proportional to 18,720.52, 28,080.87 and 7,627.31 is: 11,441.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.52 : 28,080.87 = 7,627.31 : x
  2. Step 2: Convert to fraction form
    18,720.52/28,080.87 = 7,627.31/x
  3. Step 3: Cross multiply
    18,720.52x = 28,080.87 × 7,627.31
  4. Step 4: Simplify right side
    18,720.52x = 214,181,500.56
  5. Step 5: Solve for x
    x = 214,181,500.56/18,720.52
  6. Step 6: Final answer
    x = 11,441.00

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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.