Home / 20,999.28-28,979.01-11,567.85

Finding the Fourth Proportional to 20,999.28, 28,979.01 and 11,567.85

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Solution

The fourth proportional to 20,999.28, 28,979.01 and 11,567.85 is: 15,963.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.28 : 28,979.01 = 11,567.85 : x
  2. Step 2: Convert to fraction form
    20,999.28/28,979.01 = 11,567.85/x
  3. Step 3: Cross multiply
    20,999.28x = 28,979.01 × 11,567.85
  4. Step 4: Simplify right side
    20,999.28x = 335,224,840.83
  5. Step 5: Solve for x
    x = 335,224,840.83/20,999.28
  6. Step 6: Final answer
    x = 15,963.63

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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.