Home / 6,319.08-8,720.40-3,486.72

Finding the Fourth Proportional to 6,319.08, 8,720.40 and 3,486.72

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Solution

The fourth proportional to 6,319.08, 8,720.40 and 3,486.72 is: 4,811.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,319.08 : 8,720.40 = 3,486.72 : x
  2. Step 2: Convert to fraction form
    6,319.08/8,720.40 = 3,486.72/x
  3. Step 3: Cross multiply
    6,319.08x = 8,720.40 × 3,486.72
  4. Step 4: Simplify right side
    6,319.08x = 30,405,593.09
  5. Step 5: Solve for x
    x = 30,405,593.09/6,319.08
  6. Step 6: Final answer
    x = 4,811.71

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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.