Home / 28,469,009.80-42,703,514.70-20,854,750.60

Finding the Fourth Proportional to 28,469,009.80, 42,703,514.70 and 20,854,750.60

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Solution

The fourth proportional to 28,469,009.80, 42,703,514.70 and 20,854,750.60 is: 31,282,125.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469,009.80 : 42,703,514.70 = 20,854,750.60 : x
  2. Step 2: Convert to fraction form
    28,469,009.80/42,703,514.70 = 20,854,750.60/x
  3. Step 3: Cross multiply
    28,469,009.80x = 42,703,514.70 × 20,854,750.60
  4. Step 4: Simplify right side
    28,469,009.80x = 890,571,148,811,934
  5. Step 5: Solve for x
    x = 890,571,148,811,934/28,469,009.80
  6. Step 6: Final answer
    x = 31,282,125.90

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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.