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Finding the Fourth Proportional to 6,917.28, 10,325.78 and 6,403.38

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Solution

The fourth proportional to 6,917.28, 10,325.78 and 6,403.38 is: 9,558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.28 : 10,325.78 = 6,403.38 : x
  2. Step 2: Convert to fraction form
    6,917.28/10,325.78 = 6,403.38/x
  3. Step 3: Cross multiply
    6,917.28x = 10,325.78 × 6,403.38
  4. Step 4: Simplify right side
    6,917.28x = 66,119,861.12
  5. Step 5: Solve for x
    x = 66,119,861.12/6,917.28
  6. Step 6: Final answer
    x = 9,558.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.