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Finding the Fourth Proportional to 18,721,894.60, 28,061,846.70 and 9,620,475.40

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Solution

The fourth proportional to 18,721,894.60, 28,061,846.70 and 9,620,475.40 is: 14,419,924.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,894.60 : 28,061,846.70 = 9,620,475.40 : x
  2. Step 2: Convert to fraction form
    18,721,894.60/28,061,846.70 = 9,620,475.40/x
  3. Step 3: Cross multiply
    18,721,894.60x = 28,061,846.70 × 9,620,475.40
  4. Step 4: Simplify right side
    18,721,894.60x = 269,968,305,855,921.19
  5. Step 5: Solve for x
    x = 269,968,305,855,921.19/18,721,894.60
  6. Step 6: Final answer
    x = 14,419,924.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.