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Finding the Fourth Proportional to 18,701,921.25, 25,808,406.87 and 10,442,124.12

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Solution

The fourth proportional to 18,701,921.25, 25,808,406.87 and 10,442,124.12 is: 14,409,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701,921.25 : 25,808,406.87 = 10,442,124.12 : x
  2. Step 2: Convert to fraction form
    18,701,921.25/25,808,406.87 = 10,442,124.12/x
  3. Step 3: Cross multiply
    18,701,921.25x = 25,808,406.87 × 10,442,124.12
  4. Step 4: Simplify right side
    18,701,921.25x = 269,494,587,876,000.69
  5. Step 5: Solve for x
    x = 269,494,587,876,000.69/18,701,921.25
  6. Step 6: Final answer
    x = 14,409,994.80

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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.