Home / 21,738.87-30,001.55-12,178.62

Finding the Fourth Proportional to 21,738.87, 30,001.55 and 12,178.62

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Solution

The fourth proportional to 21,738.87, 30,001.55 and 12,178.62 is: 16,807.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.87 : 30,001.55 = 12,178.62 : x
  2. Step 2: Convert to fraction form
    21,738.87/30,001.55 = 12,178.62/x
  3. Step 3: Cross multiply
    21,738.87x = 30,001.55 × 12,178.62
  4. Step 4: Simplify right side
    21,738.87x = 365,377,415.97
  5. Step 5: Solve for x
    x = 365,377,415.97/21,738.87
  6. Step 6: Final answer
    x = 16,807.56

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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.