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Finding the Fourth Proportional to 18,836.96, 28,240.85 and 8,980.88

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Solution

The fourth proportional to 18,836.96, 28,240.85 and 8,980.88 is: 13,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,836.96 : 28,240.85 = 8,980.88 : x
  2. Step 2: Convert to fraction form
    18,836.96/28,240.85 = 8,980.88/x
  3. Step 3: Cross multiply
    18,836.96x = 28,240.85 × 8,980.88
  4. Step 4: Simplify right side
    18,836.96x = 253,627,566.20
  5. Step 5: Solve for x
    x = 253,627,566.20/18,836.96
  6. Step 6: Final answer
    x = 13,464.36

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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.