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Finding the Fourth Proportional to 15,124.01, 20,872.49 and 8,409.51

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Solution

The fourth proportional to 15,124.01, 20,872.49 and 8,409.51 is: 11,605.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.01 : 20,872.49 = 8,409.51 : x
  2. Step 2: Convert to fraction form
    15,124.01/20,872.49 = 8,409.51/x
  3. Step 3: Cross multiply
    15,124.01x = 20,872.49 × 8,409.51
  4. Step 4: Simplify right side
    15,124.01x = 175,527,371.33
  5. Step 5: Solve for x
    x = 175,527,371.33/15,124.01
  6. Step 6: Final answer
    x = 11,605.88

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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.