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Finding the Fourth Proportional to 6,431.76, 9,647.64 and 1,814.76

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Solution

The fourth proportional to 6,431.76, 9,647.64 and 1,814.76 is: 2,722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.76 : 9,647.64 = 1,814.76 : x
  2. Step 2: Convert to fraction form
    6,431.76/9,647.64 = 1,814.76/x
  3. Step 3: Cross multiply
    6,431.76x = 9,647.64 × 1,814.76
  4. Step 4: Simplify right side
    6,431.76x = 17,508,151.17
  5. Step 5: Solve for x
    x = 17,508,151.17/6,431.76
  6. Step 6: Final answer
    x = 2,722.14

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.