Home / 8,215.72-12,314.76-2,945.66

Finding the Fourth Proportional to 8,215.72, 12,314.76 and 2,945.66

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Solution

The fourth proportional to 8,215.72, 12,314.76 and 2,945.66 is: 4,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.72 : 12,314.76 = 2,945.66 : x
  2. Step 2: Convert to fraction form
    8,215.72/12,314.76 = 2,945.66/x
  3. Step 3: Cross multiply
    8,215.72x = 12,314.76 × 2,945.66
  4. Step 4: Simplify right side
    8,215.72x = 36,275,095.94
  5. Step 5: Solve for x
    x = 36,275,095.94/8,215.72
  6. Step 6: Final answer
    x = 4,415.33

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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.