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Finding the Fourth Proportional to 18,664,368.40, 27,996,552.60 and 5,201,196.40

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Solution

The fourth proportional to 18,664,368.40, 27,996,552.60 and 5,201,196.40 is: 7,801,794.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664,368.40 : 27,996,552.60 = 5,201,196.40 : x
  2. Step 2: Convert to fraction form
    18,664,368.40/27,996,552.60 = 5,201,196.40/x
  3. Step 3: Cross multiply
    18,664,368.40x = 27,996,552.60 × 5,201,196.40
  4. Step 4: Simplify right side
    18,664,368.40x = 145,615,568,595,530.66
  5. Step 5: Solve for x
    x = 145,615,568,595,530.66/18,664,368.40
  6. Step 6: Final answer
    x = 7,801,794.60

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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.