Home / 20,997.65-28,976.80-11,437.51

Finding the Fourth Proportional to 20,997.65, 28,976.80 and 11,437.51

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Solution

The fourth proportional to 20,997.65, 28,976.80 and 11,437.51 is: 15,783.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.65 : 28,976.80 = 11,437.51 : x
  2. Step 2: Convert to fraction form
    20,997.65/28,976.80 = 11,437.51/x
  3. Step 3: Cross multiply
    20,997.65x = 28,976.80 × 11,437.51
  4. Step 4: Simplify right side
    20,997.65x = 331,422,338.73
  5. Step 5: Solve for x
    x = 331,422,338.73/20,997.65
  6. Step 6: Final answer
    x = 15,783.78

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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.