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Finding the Fourth Proportional to 18,663,769.60, 27,995,654.40 and 5,200,597.60

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Solution

The fourth proportional to 18,663,769.60, 27,995,654.40 and 5,200,597.60 is: 7,800,896.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663,769.60 : 27,995,654.40 = 5,200,597.60 : x
  2. Step 2: Convert to fraction form
    18,663,769.60/27,995,654.40 = 5,200,597.60/x
  3. Step 3: Cross multiply
    18,663,769.60x = 27,995,654.40 × 5,200,597.60
  4. Step 4: Simplify right side
    18,663,769.60x = 145,594,133,083,069.41
  5. Step 5: Solve for x
    x = 145,594,133,083,069.41/18,663,769.60
  6. Step 6: Final answer
    x = 7,800,896.40

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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.