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Finding the Fourth Proportional to 8,620,668.70, 12,931,003.05 and 7,079,489.80

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Solution

The fourth proportional to 8,620,668.70, 12,931,003.05 and 7,079,489.80 is: 10,619,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620,668.70 : 12,931,003.05 = 7,079,489.80 : x
  2. Step 2: Convert to fraction form
    8,620,668.70/12,931,003.05 = 7,079,489.80/x
  3. Step 3: Cross multiply
    8,620,668.70x = 12,931,003.05 × 7,079,489.80
  4. Step 4: Simplify right side
    8,620,668.70x = 91,544,904,196,243.89
  5. Step 5: Solve for x
    x = 91,544,904,196,243.89/8,620,668.70
  6. Step 6: Final answer
    x = 10,619,234.70

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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.