Home / 21,126,631.80-31,689,947.70-20,977,332.60

Finding the Fourth Proportional to 21,126,631.80, 31,689,947.70 and 20,977,332.60

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Solution

The fourth proportional to 21,126,631.80, 31,689,947.70 and 20,977,332.60 is: 31,465,998.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126,631.80 : 31,689,947.70 = 20,977,332.60 : x
  2. Step 2: Convert to fraction form
    21,126,631.80/31,689,947.70 = 20,977,332.60/x
  3. Step 3: Cross multiply
    21,126,631.80x = 31,689,947.70 × 20,977,332.60
  4. Step 4: Simplify right side
    21,126,631.80x = 664,770,572,979,505
  5. Step 5: Solve for x
    x = 664,770,572,979,505/21,126,631.80
  6. Step 6: Final answer
    x = 31,465,998.90

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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.