Home / 28,305,661.21-42,451,476.10-12,129,778.15

Finding the Fourth Proportional to 28,305,661.21, 42,451,476.10 and 12,129,778.15

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Solution

The fourth proportional to 28,305,661.21, 42,451,476.10 and 12,129,778.15 is: 18,191,660.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305,661.21 : 42,451,476.10 = 12,129,778.15 : x
  2. Step 2: Convert to fraction form
    28,305,661.21/42,451,476.10 = 12,129,778.15/x
  3. Step 3: Cross multiply
    28,305,661.21x = 42,451,476.10 × 12,129,778.15
  4. Step 4: Simplify right side
    28,305,661.21x = 514,926,987,096,574.06
  5. Step 5: Solve for x
    x = 514,926,987,096,574.06/28,305,661.21
  6. Step 6: Final answer
    x = 18,191,660.79

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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.