Home / 21,315,280.80-31,965,922.80-7,850,359.20

Finding the Fourth Proportional to 21,315,280.80, 31,965,922.80 and 7,850,359.20

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Solution

The fourth proportional to 21,315,280.80, 31,965,922.80 and 7,850,359.20 is: 11,772,961.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315,280.80 : 31,965,922.80 = 7,850,359.20 : x
  2. Step 2: Convert to fraction form
    21,315,280.80/31,965,922.80 = 7,850,359.20/x
  3. Step 3: Cross multiply
    21,315,280.80x = 31,965,922.80 × 7,850,359.20
  4. Step 4: Simplify right side
    21,315,280.80x = 250,943,976,139,469.78
  5. Step 5: Solve for x
    x = 250,943,976,139,469.78/21,315,280.80
  6. Step 6: Final answer
    x = 11,772,961.31

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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.