Home / 18,727.54-25,857-15,158.38

Finding the Fourth Proportional to 18,727.54, 25,857 and 15,158.38

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Solution

The fourth proportional to 18,727.54, 25,857 and 15,158.38 is: 20,929.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,727.54 : 25,857 = 15,158.38 : x
  2. Step 2: Convert to fraction form
    18,727.54/25,857 = 15,158.38/x
  3. Step 3: Cross multiply
    18,727.54x = 25,857 × 15,158.38
  4. Step 4: Simplify right side
    18,727.54x = 391,950,231.66
  5. Step 5: Solve for x
    x = 391,950,231.66/18,727.54
  6. Step 6: Final answer
    x = 20,929.08

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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.