Home / 20,917.08-28,870.02-12,538.44

Finding the Fourth Proportional to 20,917.08, 28,870.02 and 12,538.44

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Solution

The fourth proportional to 20,917.08, 28,870.02 and 12,538.44 is: 17,305.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.08 : 28,870.02 = 12,538.44 : x
  2. Step 2: Convert to fraction form
    20,917.08/28,870.02 = 12,538.44/x
  3. Step 3: Cross multiply
    20,917.08x = 28,870.02 × 12,538.44
  4. Step 4: Simplify right side
    20,917.08x = 361,985,013.57
  5. Step 5: Solve for x
    x = 361,985,013.57/20,917.08
  6. Step 6: Final answer
    x = 17,305.71

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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.