Home / 20,788.80-28,689.21-11,357.37

Finding the Fourth Proportional to 20,788.80, 28,689.21 and 11,357.37

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Solution

The fourth proportional to 20,788.80, 28,689.21 and 11,357.37 is: 15,673.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.80 : 28,689.21 = 11,357.37 : x
  2. Step 2: Convert to fraction form
    20,788.80/28,689.21 = 11,357.37/x
  3. Step 3: Cross multiply
    20,788.80x = 28,689.21 × 11,357.37
  4. Step 4: Simplify right side
    20,788.80x = 325,833,972.98
  5. Step 5: Solve for x
    x = 325,833,972.98/20,788.80
  6. Step 6: Final answer
    x = 15,673.53

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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.