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Finding the Fourth Proportional to 15,202.58, 20,979.21 and 8,488.83

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Solution

The fourth proportional to 15,202.58, 20,979.21 and 8,488.83 is: 11,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.58 : 20,979.21 = 8,488.83 : x
  2. Step 2: Convert to fraction form
    15,202.58/20,979.21 = 8,488.83/x
  3. Step 3: Cross multiply
    15,202.58x = 20,979.21 × 8,488.83
  4. Step 4: Simplify right side
    15,202.58x = 178,089,057.73
  5. Step 5: Solve for x
    x = 178,089,057.73/15,202.58
  6. Step 6: Final answer
    x = 11,714.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.