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Finding the Fourth Proportional to 28,144.02, 38,837.04 and 15,394.80

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Solution

The fourth proportional to 28,144.02, 38,837.04 and 15,394.80 is: 21,243.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,144.02 : 38,837.04 = 15,394.80 : x
  2. Step 2: Convert to fraction form
    28,144.02/38,837.04 = 15,394.80/x
  3. Step 3: Cross multiply
    28,144.02x = 38,837.04 × 15,394.80
  4. Step 4: Simplify right side
    28,144.02x = 597,888,463.39
  5. Step 5: Solve for x
    x = 597,888,463.39/28,144.02
  6. Step 6: Final answer
    x = 21,243.89

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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.