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Finding the Fourth Proportional to 7,670.92, 11,491.71 and 6,429.46

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Solution

The fourth proportional to 7,670.92, 11,491.71 and 6,429.46 is: 9,631.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,670.92 : 11,491.71 = 6,429.46 : x
  2. Step 2: Convert to fraction form
    7,670.92/11,491.71 = 6,429.46/x
  3. Step 3: Cross multiply
    7,670.92x = 11,491.71 × 6,429.46
  4. Step 4: Simplify right side
    7,670.92x = 73,885,489.78
  5. Step 5: Solve for x
    x = 73,885,489.78/7,670.92
  6. Step 6: Final answer
    x = 9,631.89

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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.