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Finding the Fourth Proportional to 18,808,978.26, 28,213,817.44 and 5,346,156.18

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Solution

The fourth proportional to 18,808,978.26, 28,213,817.44 and 5,346,156.18 is: 8,019,333.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808,978.26 : 28,213,817.44 = 5,346,156.18 : x
  2. Step 2: Convert to fraction form
    18,808,978.26/28,213,817.44 = 5,346,156.18/x
  3. Step 3: Cross multiply
    18,808,978.26x = 28,213,817.44 × 5,346,156.18
  4. Step 4: Simplify right side
    18,808,978.26x = 150,835,474,468,247.78
  5. Step 5: Solve for x
    x = 150,835,474,468,247.78/18,808,978.26
  6. Step 6: Final answer
    x = 8,019,333.77

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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.