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Finding the Fourth Proportional to 12,990,961.60, 19,486,442.40 and 4,016,420.80

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Solution

The fourth proportional to 12,990,961.60, 19,486,442.40 and 4,016,420.80 is: 6,024,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990,961.60 : 19,486,442.40 = 4,016,420.80 : x
  2. Step 2: Convert to fraction form
    12,990,961.60/19,486,442.40 = 4,016,420.80/x
  3. Step 3: Cross multiply
    12,990,961.60x = 19,486,442.40 × 4,016,420.80
  4. Step 4: Simplify right side
    12,990,961.60x = 78,265,752,573,361.91
  5. Step 5: Solve for x
    x = 78,265,752,573,361.91/12,990,961.60
  6. Step 6: Final answer
    x = 6,024,631.20

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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.