Home / 20,788.62-28,688.79-11,358.06

Finding the Fourth Proportional to 20,788.62, 28,688.79 and 11,358.06

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Solution

The fourth proportional to 20,788.62, 28,688.79 and 11,358.06 is: 15,674.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.62 : 28,688.79 = 11,358.06 : x
  2. Step 2: Convert to fraction form
    20,788.62/28,688.79 = 11,358.06/x
  3. Step 3: Cross multiply
    20,788.62x = 28,688.79 × 11,358.06
  4. Step 4: Simplify right side
    20,788.62x = 325,848,998.15
  5. Step 5: Solve for x
    x = 325,848,998.15/20,788.62
  6. Step 6: Final answer
    x = 15,674.39

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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.