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Finding the Fourth Proportional to 18,679,640.70, 28,019,461.05 and 6,562,785.90

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Solution

The fourth proportional to 18,679,640.70, 28,019,461.05 and 6,562,785.90 is: 9,844,178.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,640.70 : 28,019,461.05 = 6,562,785.90 : x
  2. Step 2: Convert to fraction form
    18,679,640.70/28,019,461.05 = 6,562,785.90/x
  3. Step 3: Cross multiply
    18,679,640.70x = 28,019,461.05 × 6,562,785.90
  4. Step 4: Simplify right side
    18,679,640.70x = 183,885,723,904,539.22
  5. Step 5: Solve for x
    x = 183,885,723,904,539.22/18,679,640.70
  6. Step 6: Final answer
    x = 9,844,178.85

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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.