Home / 6,420.76-8,861.06-3,767.20

Finding the Fourth Proportional to 6,420.76, 8,861.06 and 3,767.20

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Solution

The fourth proportional to 6,420.76, 8,861.06 and 3,767.20 is: 5,198.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.76 : 8,861.06 = 3,767.20 : x
  2. Step 2: Convert to fraction form
    6,420.76/8,861.06 = 3,767.20/x
  3. Step 3: Cross multiply
    6,420.76x = 8,861.06 × 3,767.20
  4. Step 4: Simplify right side
    6,420.76x = 33,381,385.23
  5. Step 5: Solve for x
    x = 33,381,385.23/6,420.76
  6. Step 6: Final answer
    x = 5,198.98

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Half scale
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Double scale
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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.