Home / 20,879.04-28,809.44-13,801.76

Finding the Fourth Proportional to 20,879.04, 28,809.44 and 13,801.76

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Solution

The fourth proportional to 20,879.04, 28,809.44 and 13,801.76 is: 19,044.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.04 : 28,809.44 = 13,801.76 : x
  2. Step 2: Convert to fraction form
    20,879.04/28,809.44 = 13,801.76/x
  3. Step 3: Cross multiply
    20,879.04x = 28,809.44 × 13,801.76
  4. Step 4: Simplify right side
    20,879.04x = 397,620,976.61
  5. Step 5: Solve for x
    x = 397,620,976.61/20,879.04
  6. Step 6: Final answer
    x = 19,044.03

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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.