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Finding the Fourth Proportional to 20,637.44, 28,479.48 and 11,205.44

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Solution

The fourth proportional to 20,637.44, 28,479.48 and 11,205.44 is: 15,463.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.44 : 28,479.48 = 11,205.44 : x
  2. Step 2: Convert to fraction form
    20,637.44/28,479.48 = 11,205.44/x
  3. Step 3: Cross multiply
    20,637.44x = 28,479.48 × 11,205.44
  4. Step 4: Simplify right side
    20,637.44x = 319,125,104.37
  5. Step 5: Solve for x
    x = 319,125,104.37/20,637.44
  6. Step 6: Final answer
    x = 15,463.41

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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.