Home / 20,320.67-28,042.52-13,247.09

Finding the Fourth Proportional to 20,320.67, 28,042.52 and 13,247.09

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Solution

The fourth proportional to 20,320.67, 28,042.52 and 13,247.09 is: 18,280.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.67 : 28,042.52 = 13,247.09 : x
  2. Step 2: Convert to fraction form
    20,320.67/28,042.52 = 13,247.09/x
  3. Step 3: Cross multiply
    20,320.67x = 28,042.52 × 13,247.09
  4. Step 4: Simplify right side
    20,320.67x = 371,481,917.23
  5. Step 5: Solve for x
    x = 371,481,917.23/20,320.67
  6. Step 6: Final answer
    x = 18,280.99

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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.