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Finding the Fourth Proportional to 18,943,616.20, 28,415,424.30 and 8,306,048.20

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Solution

The fourth proportional to 18,943,616.20, 28,415,424.30 and 8,306,048.20 is: 12,459,072.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943,616.20 : 28,415,424.30 = 8,306,048.20 : x
  2. Step 2: Convert to fraction form
    18,943,616.20/28,415,424.30 = 8,306,048.20/x
  3. Step 3: Cross multiply
    18,943,616.20x = 28,415,424.30 × 8,306,048.20
  4. Step 4: Simplify right side
    18,943,616.20x = 236,019,883,859,251.28
  5. Step 5: Solve for x
    x = 236,019,883,859,251.28/18,943,616.20
  6. Step 6: Final answer
    x = 12,459,072.30

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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.