Home / 8,778.85-12,112.37-5,240.77

Finding the Fourth Proportional to 8,778.85, 12,112.37 and 5,240.77

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Solution

The fourth proportional to 8,778.85, 12,112.37 and 5,240.77 is: 7,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.85 : 12,112.37 = 5,240.77 : x
  2. Step 2: Convert to fraction form
    8,778.85/12,112.37 = 5,240.77/x
  3. Step 3: Cross multiply
    8,778.85x = 12,112.37 × 5,240.77
  4. Step 4: Simplify right side
    8,778.85x = 63,478,108.49
  5. Step 5: Solve for x
    x = 63,478,108.49/8,778.85
  6. Step 6: Final answer
    x = 7,230.80

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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.