Home / 8,720.22-12,039.48-6,699.72

Finding the Fourth Proportional to 8,720.22, 12,039.48 and 6,699.72

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Solution

The fourth proportional to 8,720.22, 12,039.48 and 6,699.72 is: 9,249.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.22 : 12,039.48 = 6,699.72 : x
  2. Step 2: Convert to fraction form
    8,720.22/12,039.48 = 6,699.72/x
  3. Step 3: Cross multiply
    8,720.22x = 12,039.48 × 6,699.72
  4. Step 4: Simplify right side
    8,720.22x = 80,661,144.95
  5. Step 5: Solve for x
    x = 80,661,144.95/8,720.22
  6. Step 6: Final answer
    x = 9,249.90

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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.