Home / 20,902-28,844.28-11,577.80

Finding the Fourth Proportional to 20,902, 28,844.28 and 11,577.80

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Solution

The fourth proportional to 20,902, 28,844.28 and 11,577.80 is: 15,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902 : 28,844.28 = 11,577.80 : x
  2. Step 2: Convert to fraction form
    20,902/28,844.28 = 11,577.80/x
  3. Step 3: Cross multiply
    20,902x = 28,844.28 × 11,577.80
  4. Step 4: Simplify right side
    20,902x = 333,953,304.98
  5. Step 5: Solve for x
    x = 333,953,304.98/20,902
  6. Step 6: Final answer
    x = 15,977.10

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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.