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Finding the Fourth Proportional to 28,797.78, 43,196.70 and 18,980.90

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Solution

The fourth proportional to 28,797.78, 43,196.70 and 18,980.90 is: 28,471.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,797.78 : 43,196.70 = 18,980.90 : x
  2. Step 2: Convert to fraction form
    28,797.78/43,196.70 = 18,980.90/x
  3. Step 3: Cross multiply
    28,797.78x = 43,196.70 × 18,980.90
  4. Step 4: Simplify right side
    28,797.78x = 819,912,027.05
  5. Step 5: Solve for x
    x = 819,912,027.05/28,797.78
  6. Step 6: Final answer
    x = 28,471.36

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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.