Home / 20,788.97-28,688.78-11,228.87

Finding the Fourth Proportional to 20,788.97, 28,688.78 and 11,228.87

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Solution

The fourth proportional to 20,788.97, 28,688.78 and 11,228.87 is: 15,495.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.97 : 28,688.78 = 11,228.87 : x
  2. Step 2: Convert to fraction form
    20,788.97/28,688.78 = 11,228.87/x
  3. Step 3: Cross multiply
    20,788.97x = 28,688.78 × 11,228.87
  4. Step 4: Simplify right side
    20,788.97x = 322,142,581.08
  5. Step 5: Solve for x
    x = 322,142,581.08/20,788.97
  6. Step 6: Final answer
    x = 15,495.84

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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.