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Finding the Fourth Proportional to 18,902,603.40, 28,353,905.10 and 14,367,640.20

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Solution

The fourth proportional to 18,902,603.40, 28,353,905.10 and 14,367,640.20 is: 21,551,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902,603.40 : 28,353,905.10 = 14,367,640.20 : x
  2. Step 2: Convert to fraction form
    18,902,603.40/28,353,905.10 = 14,367,640.20/x
  3. Step 3: Cross multiply
    18,902,603.40x = 28,353,905.10 × 14,367,640.20
  4. Step 4: Simplify right side
    18,902,603.40x = 407,378,706,741,745
  5. Step 5: Solve for x
    x = 407,378,706,741,745/18,902,603.40
  6. Step 6: Final answer
    x = 21,551,460.30

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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.