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Finding the Fourth Proportional to 6,428.76, 8,874.57 and 3,776.34

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Solution

The fourth proportional to 6,428.76, 8,874.57 and 3,776.34 is: 5,213.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.76 : 8,874.57 = 3,776.34 : x
  2. Step 2: Convert to fraction form
    6,428.76/8,874.57 = 3,776.34/x
  3. Step 3: Cross multiply
    6,428.76x = 8,874.57 × 3,776.34
  4. Step 4: Simplify right side
    6,428.76x = 33,513,393.67
  5. Step 5: Solve for x
    x = 33,513,393.67/6,428.76
  6. Step 6: Final answer
    x = 5,213.04

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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.