Home / 18,781.37-25,919.72-10,715.20

Finding the Fourth Proportional to 18,781.37, 25,919.72 and 10,715.20

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Solution

The fourth proportional to 18,781.37, 25,919.72 and 10,715.20 is: 14,787.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.37 : 25,919.72 = 10,715.20 : x
  2. Step 2: Convert to fraction form
    18,781.37/25,919.72 = 10,715.20/x
  3. Step 3: Cross multiply
    18,781.37x = 25,919.72 × 10,715.20
  4. Step 4: Simplify right side
    18,781.37x = 277,734,983.74
  5. Step 5: Solve for x
    x = 277,734,983.74/18,781.37
  6. Step 6: Final answer
    x = 14,787.79

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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.