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Finding the Fourth Proportional to 12,491.67, 17,238.88 and 6,826.93

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Solution

The fourth proportional to 12,491.67, 17,238.88 and 6,826.93 is: 9,421.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.67 : 17,238.88 = 6,826.93 : x
  2. Step 2: Convert to fraction form
    12,491.67/17,238.88 = 6,826.93/x
  3. Step 3: Cross multiply
    12,491.67x = 17,238.88 × 6,826.93
  4. Step 4: Simplify right side
    12,491.67x = 117,688,651.04
  5. Step 5: Solve for x
    x = 117,688,651.04/12,491.67
  6. Step 6: Final answer
    x = 9,421.37

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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.