Home / 6,431.40-8,875.20-3,636.90

Finding the Fourth Proportional to 6,431.40, 8,875.20 and 3,636.90

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Solution

The fourth proportional to 6,431.40, 8,875.20 and 3,636.90 is: 5,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.40 : 8,875.20 = 3,636.90 : x
  2. Step 2: Convert to fraction form
    6,431.40/8,875.20 = 3,636.90/x
  3. Step 3: Cross multiply
    6,431.40x = 8,875.20 × 3,636.90
  4. Step 4: Simplify right side
    6,431.40x = 32,278,214.88
  5. Step 5: Solve for x
    x = 32,278,214.88/6,431.40
  6. Step 6: Final answer
    x = 5,018.85

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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.