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Finding the Fourth Proportional to 18,808,978.25, 28,213,817.43 and 5,346,156.17

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Solution

The fourth proportional to 18,808,978.25, 28,213,817.43 and 5,346,156.17 is: 8,019,333.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808,978.25 : 28,213,817.43 = 5,346,156.17 : x
  2. Step 2: Convert to fraction form
    18,808,978.25/28,213,817.43 = 5,346,156.17/x
  3. Step 3: Cross multiply
    18,808,978.25x = 28,213,817.43 × 5,346,156.17
  4. Step 4: Simplify right side
    18,808,978.25x = 150,835,474,132,648.03
  5. Step 5: Solve for x
    x = 150,835,474,132,648.03/18,808,978.25
  6. Step 6: Final answer
    x = 8,019,333.75

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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.