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Finding the Fourth Proportional to 20,679,978.80, 31,019,968.20 and 11,610,052.40

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Solution

The fourth proportional to 20,679,978.80, 31,019,968.20 and 11,610,052.40 is: 17,415,078.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679,978.80 : 31,019,968.20 = 11,610,052.40 : x
  2. Step 2: Convert to fraction form
    20,679,978.80/31,019,968.20 = 11,610,052.40/x
  3. Step 3: Cross multiply
    20,679,978.80x = 31,019,968.20 × 11,610,052.40
  4. Step 4: Simplify right side
    20,679,978.80x = 360,143,456,248,333.69
  5. Step 5: Solve for x
    x = 360,143,456,248,333.69/20,679,978.80
  6. Step 6: Final answer
    x = 17,415,078.60

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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.