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Finding the Fourth Proportional to 28,147,894.88, 38,843,832.49 and 15,924,751.88

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Solution

The fourth proportional to 28,147,894.88, 38,843,832.49 and 15,924,751.88 is: 21,976,009.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147,894.88 : 38,843,832.49 = 15,924,751.88 : x
  2. Step 2: Convert to fraction form
    28,147,894.88/38,843,832.49 = 15,924,751.88/x
  3. Step 3: Cross multiply
    28,147,894.88x = 38,843,832.49 × 15,924,751.88
  4. Step 4: Simplify right side
    28,147,894.88x = 618,578,394,237,501.50
  5. Step 5: Solve for x
    x = 618,578,394,237,501.50/28,147,894.88
  6. Step 6: Final answer
    x = 21,976,009.11

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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.