Home / 21,004.25-28,986-11,572.88

Finding the Fourth Proportional to 21,004.25, 28,986 and 11,572.88

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Solution

The fourth proportional to 21,004.25, 28,986 and 11,572.88 is: 15,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.25 : 28,986 = 11,572.88 : x
  2. Step 2: Convert to fraction form
    21,004.25/28,986 = 11,572.88/x
  3. Step 3: Cross multiply
    21,004.25x = 28,986 × 11,572.88
  4. Step 4: Simplify right side
    21,004.25x = 335,451,499.68
  5. Step 5: Solve for x
    x = 335,451,499.68/21,004.25
  6. Step 6: Final answer
    x = 15,970.65

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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.