Home / 6,431.20-8,875.37-3,778.65

Finding the Fourth Proportional to 6,431.20, 8,875.37 and 3,778.65

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Solution

The fourth proportional to 6,431.20, 8,875.37 and 3,778.65 is: 5,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.20 : 8,875.37 = 3,778.65 : x
  2. Step 2: Convert to fraction form
    6,431.20/8,875.37 = 3,778.65/x
  3. Step 3: Cross multiply
    6,431.20x = 8,875.37 × 3,778.65
  4. Step 4: Simplify right side
    6,431.20x = 33,536,926.30
  5. Step 5: Solve for x
    x = 33,536,926.30/6,431.20
  6. Step 6: Final answer
    x = 5,214.72

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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.