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Finding the Fourth Proportional to 15,154.93, 20,911.97 and 8,694.24

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Solution

The fourth proportional to 15,154.93, 20,911.97 and 8,694.24 is: 11,996.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.93 : 20,911.97 = 8,694.24 : x
  2. Step 2: Convert to fraction form
    15,154.93/20,911.97 = 8,694.24/x
  3. Step 3: Cross multiply
    15,154.93x = 20,911.97 × 8,694.24
  4. Step 4: Simplify right side
    15,154.93x = 181,813,559.76
  5. Step 5: Solve for x
    x = 181,813,559.76/15,154.93
  6. Step 6: Final answer
    x = 11,996.99

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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.