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Finding the Fourth Proportional to 28,978,397.80, 43,467,596.70 and 8,781,015.40

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Solution

The fourth proportional to 28,978,397.80, 43,467,596.70 and 8,781,015.40 is: 13,171,523.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,397.80 : 43,467,596.70 = 8,781,015.40 : x
  2. Step 2: Convert to fraction form
    28,978,397.80/43,467,596.70 = 8,781,015.40/x
  3. Step 3: Cross multiply
    28,978,397.80x = 43,467,596.70 × 8,781,015.40
  4. Step 4: Simplify right side
    28,978,397.80x = 381,689,636,023,689.25
  5. Step 5: Solve for x
    x = 381,689,636,023,689.25/28,978,397.80
  6. Step 6: Final answer
    x = 13,171,523.10

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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.