Home / 20,872.64-28,804.35-11,312.54

Finding the Fourth Proportional to 20,872.64, 28,804.35 and 11,312.54

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Solution

The fourth proportional to 20,872.64, 28,804.35 and 11,312.54 is: 15,611.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.64 : 28,804.35 = 11,312.54 : x
  2. Step 2: Convert to fraction form
    20,872.64/28,804.35 = 11,312.54/x
  3. Step 3: Cross multiply
    20,872.64x = 28,804.35 × 11,312.54
  4. Step 4: Simplify right side
    20,872.64x = 325,850,217.53
  5. Step 5: Solve for x
    x = 325,850,217.53/20,872.64
  6. Step 6: Final answer
    x = 15,611.36

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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.