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Finding the Fourth Proportional to 20,596,649.60, 30,894,974.40 and 8,462,080.10

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Solution

The fourth proportional to 20,596,649.60, 30,894,974.40 and 8,462,080.10 is: 12,693,120.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,596,649.60 : 30,894,974.40 = 8,462,080.10 : x
  2. Step 2: Convert to fraction form
    20,596,649.60/30,894,974.40 = 8,462,080.10/x
  3. Step 3: Cross multiply
    20,596,649.60x = 30,894,974.40 × 8,462,080.10
  4. Step 4: Simplify right side
    20,596,649.60x = 261,435,748,060,249.41
  5. Step 5: Solve for x
    x = 261,435,748,060,249.41/20,596,649.60
  6. Step 6: Final answer
    x = 12,693,120.15

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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.