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Finding the Fourth Proportional to 18,965,221.47, 28,447,906.01 and 4,588,266.20

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Solution

The fourth proportional to 18,965,221.47, 28,447,906.01 and 4,588,266.20 is: 6,882,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965,221.47 : 28,447,906.01 = 4,588,266.20 : x
  2. Step 2: Convert to fraction form
    18,965,221.47/28,447,906.01 = 4,588,266.20/x
  3. Step 3: Cross multiply
    18,965,221.47x = 28,447,906.01 × 4,588,266.20
  4. Step 4: Simplify right side
    18,965,221.47x = 130,526,565,441,279
  5. Step 5: Solve for x
    x = 130,526,565,441,279/18,965,221.47
  6. Step 6: Final answer
    x = 6,882,417.15

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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.