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Finding the Fourth Proportional to 15,853,191.52, 21,878,753.52 and 8,978,896.48

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Solution

The fourth proportional to 15,853,191.52, 21,878,753.52 and 8,978,896.48 is: 12,391,641.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853,191.52 : 21,878,753.52 = 8,978,896.48 : x
  2. Step 2: Convert to fraction form
    15,853,191.52/21,878,753.52 = 8,978,896.48/x
  3. Step 3: Cross multiply
    15,853,191.52x = 21,878,753.52 × 8,978,896.48
  4. Step 4: Simplify right side
    15,853,191.52x = 196,447,062,967,515.62
  5. Step 5: Solve for x
    x = 196,447,062,967,515.62/15,853,191.52
  6. Step 6: Final answer
    x = 12,391,641.31

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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.