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Finding the Fourth Proportional to 19,791,003.20, 29,686,504.80 and 12,232,731.20

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Solution

The fourth proportional to 19,791,003.20, 29,686,504.80 and 12,232,731.20 is: 18,349,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791,003.20 : 29,686,504.80 = 12,232,731.20 : x
  2. Step 2: Convert to fraction form
    19,791,003.20/29,686,504.80 = 12,232,731.20/x
  3. Step 3: Cross multiply
    19,791,003.20x = 29,686,504.80 × 12,232,731.20
  4. Step 4: Simplify right side
    19,791,003.20x = 363,147,033,485,909.75
  5. Step 5: Solve for x
    x = 363,147,033,485,909.75/19,791,003.20
  6. Step 6: Final answer
    x = 18,349,096.80

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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.