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Finding the Fourth Proportional to 11,491.79, 15,858.72 and 6,715.11

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Solution

The fourth proportional to 11,491.79, 15,858.72 and 6,715.11 is: 9,266.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,491.79 : 15,858.72 = 6,715.11 : x
  2. Step 2: Convert to fraction form
    11,491.79/15,858.72 = 6,715.11/x
  3. Step 3: Cross multiply
    11,491.79x = 15,858.72 × 6,715.11
  4. Step 4: Simplify right side
    11,491.79x = 106,493,108.73
  5. Step 5: Solve for x
    x = 106,493,108.73/11,491.79
  6. Step 6: Final answer
    x = 9,266.89

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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.