Home / 20,788.94-28,688.68-11,357.57

Finding the Fourth Proportional to 20,788.94, 28,688.68 and 11,357.57

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Solution

The fourth proportional to 20,788.94, 28,688.68 and 11,357.57 is: 15,673.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.94 : 28,688.68 = 11,357.57 : x
  2. Step 2: Convert to fraction form
    20,788.94/28,688.68 = 11,357.57/x
  3. Step 3: Cross multiply
    20,788.94x = 28,688.68 × 11,357.57
  4. Step 4: Simplify right side
    20,788.94x = 325,833,734.64
  5. Step 5: Solve for x
    x = 325,833,734.64/20,788.94
  6. Step 6: Final answer
    x = 15,673.42

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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.