Home / 20,788.72-28,687.92-11,357.32

Finding the Fourth Proportional to 20,788.72, 28,687.92 and 11,357.32

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Solution

The fourth proportional to 20,788.72, 28,687.92 and 11,357.32 is: 15,672.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.72 : 28,687.92 = 11,357.32 : x
  2. Step 2: Convert to fraction form
    20,788.72/28,687.92 = 11,357.32/x
  3. Step 3: Cross multiply
    20,788.72x = 28,687.92 × 11,357.32
  4. Step 4: Simplify right side
    20,788.72x = 325,817,887.57
  5. Step 5: Solve for x
    x = 325,817,887.57/20,788.72
  6. Step 6: Final answer
    x = 15,672.82

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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.