Home / 8,778.50-12,110.92-5,415.48

Finding the Fourth Proportional to 8,778.50, 12,110.92 and 5,415.48

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Solution

The fourth proportional to 8,778.50, 12,110.92 and 5,415.48 is: 7,471.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.50 : 12,110.92 = 5,415.48 : x
  2. Step 2: Convert to fraction form
    8,778.50/12,110.92 = 5,415.48/x
  3. Step 3: Cross multiply
    8,778.50x = 12,110.92 × 5,415.48
  4. Step 4: Simplify right side
    8,778.50x = 65,586,465.56
  5. Step 5: Solve for x
    x = 65,586,465.56/8,778.50
  6. Step 6: Final answer
    x = 7,471.26

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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.