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Finding the Fourth Proportional to 19,796,873.60, 29,695,310.40 and 12,994,428.80

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Solution

The fourth proportional to 19,796,873.60, 29,695,310.40 and 12,994,428.80 is: 19,491,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,796,873.60 : 29,695,310.40 = 12,994,428.80 : x
  2. Step 2: Convert to fraction form
    19,796,873.60/29,695,310.40 = 12,994,428.80/x
  3. Step 3: Cross multiply
    19,796,873.60x = 29,695,310.40 × 12,994,428.80
  4. Step 4: Simplify right side
    19,796,873.60x = 385,873,596,686,699.50
  5. Step 5: Solve for x
    x = 385,873,596,686,699.50/19,796,873.60
  6. Step 6: Final answer
    x = 19,491,643.20

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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.