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Finding the Fourth Proportional to 12,491.84, 17,239.92 and 6,902.84

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Solution

The fourth proportional to 12,491.84, 17,239.92 and 6,902.84 is: 9,526.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.84 : 17,239.92 = 6,902.84 : x
  2. Step 2: Convert to fraction form
    12,491.84/17,239.92 = 6,902.84/x
  3. Step 3: Cross multiply
    12,491.84x = 17,239.92 × 6,902.84
  4. Step 4: Simplify right side
    12,491.84x = 119,004,409.37
  5. Step 5: Solve for x
    x = 119,004,409.37/12,491.84
  6. Step 6: Final answer
    x = 9,526.57

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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.