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Finding the Fourth Proportional to 18,709,602.84, 28,059,532.72 and 7,921,350.54

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Solution

The fourth proportional to 18,709,602.84, 28,059,532.72 and 7,921,350.54 is: 11,879,963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709,602.84 : 28,059,532.72 = 7,921,350.54 : x
  2. Step 2: Convert to fraction form
    18,709,602.84/28,059,532.72 = 7,921,350.54/x
  3. Step 3: Cross multiply
    18,709,602.84x = 28,059,532.72 × 7,921,350.54
  4. Step 4: Simplify right side
    18,709,602.84x = 222,269,394,663,719.66
  5. Step 5: Solve for x
    x = 222,269,394,663,719.66/18,709,602.84
  6. Step 6: Final answer
    x = 11,879,963.28

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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.