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Finding the Fourth Proportional to 28,146, 38,841.48 and 15,571.56

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Solution

The fourth proportional to 28,146, 38,841.48 and 15,571.56 is: 21,488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146 : 38,841.48 = 15,571.56 : x
  2. Step 2: Convert to fraction form
    28,146/38,841.48 = 15,571.56/x
  3. Step 3: Cross multiply
    28,146x = 38,841.48 × 15,571.56
  4. Step 4: Simplify right side
    28,146x = 604,822,436.31
  5. Step 5: Solve for x
    x = 604,822,436.31/28,146
  6. Step 6: Final answer
    x = 21,488.75

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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.