Home / 20,837.54-28,756-11,406.30

Finding the Fourth Proportional to 20,837.54, 28,756 and 11,406.30

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Solution

The fourth proportional to 20,837.54, 28,756 and 11,406.30 is: 15,740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.54 : 28,756 = 11,406.30 : x
  2. Step 2: Convert to fraction form
    20,837.54/28,756 = 11,406.30/x
  3. Step 3: Cross multiply
    20,837.54x = 28,756 × 11,406.30
  4. Step 4: Simplify right side
    20,837.54x = 327,999,562.80
  5. Step 5: Solve for x
    x = 327,999,562.80/20,837.54
  6. Step 6: Final answer
    x = 15,740.80

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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.