Home / 15,202,421.78-20,981,429.32-9,321,015.86

Finding the Fourth Proportional to 15,202,421.78, 20,981,429.32 and 9,321,015.86

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Solution

The fourth proportional to 15,202,421.78, 20,981,429.32 and 9,321,015.86 is: 12,864,281.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202,421.78 : 20,981,429.32 = 9,321,015.86 : x
  2. Step 2: Convert to fraction form
    15,202,421.78/20,981,429.32 = 9,321,015.86/x
  3. Step 3: Cross multiply
    15,202,421.78x = 20,981,429.32 × 9,321,015.86
  4. Step 4: Simplify right side
    15,202,421.78x = 195,568,235,457,189
  5. Step 5: Solve for x
    x = 195,568,235,457,189/15,202,421.78
  6. Step 6: Final answer
    x = 12,864,281.64

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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.