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Finding the Fourth Proportional to 28,149.66, 38,824.83 and 19,648.98

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Solution

The fourth proportional to 28,149.66, 38,824.83 and 19,648.98 is: 27,100.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.66 : 38,824.83 = 19,648.98 : x
  2. Step 2: Convert to fraction form
    28,149.66/38,824.83 = 19,648.98/x
  3. Step 3: Cross multiply
    28,149.66x = 38,824.83 × 19,648.98
  4. Step 4: Simplify right side
    28,149.66x = 762,868,308.17
  5. Step 5: Solve for x
    x = 762,868,308.17/28,149.66
  6. Step 6: Final answer
    x = 27,100.44

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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.