Home / 20,530.11-28,329.60-11,579.01

Finding the Fourth Proportional to 20,530.11, 28,329.60 and 11,579.01

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Solution

The fourth proportional to 20,530.11, 28,329.60 and 11,579.01 is: 15,977.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.11 : 28,329.60 = 11,579.01 : x
  2. Step 2: Convert to fraction form
    20,530.11/28,329.60 = 11,579.01/x
  3. Step 3: Cross multiply
    20,530.11x = 28,329.60 × 11,579.01
  4. Step 4: Simplify right side
    20,530.11x = 328,028,721.70
  5. Step 5: Solve for x
    x = 328,028,721.70/20,530.11
  6. Step 6: Final answer
    x = 15,977.93

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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.