Home / 20,885.64-28,824-11,456.04

Finding the Fourth Proportional to 20,885.64, 28,824 and 11,456.04

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Solution

The fourth proportional to 20,885.64, 28,824 and 11,456.04 is: 15,810.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.64 : 28,824 = 11,456.04 : x
  2. Step 2: Convert to fraction form
    20,885.64/28,824 = 11,456.04/x
  3. Step 3: Cross multiply
    20,885.64x = 28,824 × 11,456.04
  4. Step 4: Simplify right side
    20,885.64x = 330,208,896.96
  5. Step 5: Solve for x
    x = 330,208,896.96/20,885.64
  6. Step 6: Final answer
    x = 15,810.33

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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.