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Finding the Fourth Proportional to 28,149, 38,845.62 and 15,575.64

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Solution

The fourth proportional to 28,149, 38,845.62 and 15,575.64 is: 21,494.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149 : 38,845.62 = 15,575.64 : x
  2. Step 2: Convert to fraction form
    28,149/38,845.62 = 15,575.64/x
  3. Step 3: Cross multiply
    28,149x = 38,845.62 × 15,575.64
  4. Step 4: Simplify right side
    28,149x = 605,045,392.70
  5. Step 5: Solve for x
    x = 605,045,392.70/28,149
  6. Step 6: Final answer
    x = 21,494.38

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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.