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Finding the Fourth Proportional to 10,679.82, 14,688.92 and 9,351.22

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Solution

The fourth proportional to 10,679.82, 14,688.92 and 9,351.22 is: 12,861.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,679.82 : 14,688.92 = 9,351.22 : x
  2. Step 2: Convert to fraction form
    10,679.82/14,688.92 = 9,351.22/x
  3. Step 3: Cross multiply
    10,679.82x = 14,688.92 × 9,351.22
  4. Step 4: Simplify right side
    10,679.82x = 137,359,322.48
  5. Step 5: Solve for x
    x = 137,359,322.48/10,679.82
  6. Step 6: Final answer
    x = 12,861.58

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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.