Home / 15,546.49-21,456.96-9,172.71

Finding the Fourth Proportional to 15,546.49, 21,456.96 and 9,172.71

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Solution

The fourth proportional to 15,546.49, 21,456.96 and 9,172.71 is: 12,659.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,546.49 : 21,456.96 = 9,172.71 : x
  2. Step 2: Convert to fraction form
    15,546.49/21,456.96 = 9,172.71/x
  3. Step 3: Cross multiply
    15,546.49x = 21,456.96 × 9,172.71
  4. Step 4: Simplify right side
    15,546.49x = 196,818,471.56
  5. Step 5: Solve for x
    x = 196,818,471.56/15,546.49
  6. Step 6: Final answer
    x = 12,659.99

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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.