Home / 6,420.30-8,861.15-4,154.43

Finding the Fourth Proportional to 6,420.30, 8,861.15 and 4,154.43

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Solution

The fourth proportional to 6,420.30, 8,861.15 and 4,154.43 is: 5,733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.30 : 8,861.15 = 4,154.43 : x
  2. Step 2: Convert to fraction form
    6,420.30/8,861.15 = 4,154.43/x
  3. Step 3: Cross multiply
    6,420.30x = 8,861.15 × 4,154.43
  4. Step 4: Simplify right side
    6,420.30x = 36,813,027.39
  5. Step 5: Solve for x
    x = 36,813,027.39/6,420.30
  6. Step 6: Final answer
    x = 5,733.85

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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.