Home / 20,648.36-28,499.28-13,575.44

Finding the Fourth Proportional to 20,648.36, 28,499.28 and 13,575.44

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Solution

The fourth proportional to 20,648.36, 28,499.28 and 13,575.44 is: 18,737.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.36 : 28,499.28 = 13,575.44 : x
  2. Step 2: Convert to fraction form
    20,648.36/28,499.28 = 13,575.44/x
  3. Step 3: Cross multiply
    20,648.36x = 28,499.28 × 13,575.44
  4. Step 4: Simplify right side
    20,648.36x = 386,890,286.02
  5. Step 5: Solve for x
    x = 386,890,286.02/20,648.36
  6. Step 6: Final answer
    x = 18,737.09

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1.5x scale

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.