Home / 20,754,621.80-31,131,932.70-13,215,012.20

Finding the Fourth Proportional to 20,754,621.80, 31,131,932.70 and 13,215,012.20

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Solution

The fourth proportional to 20,754,621.80, 31,131,932.70 and 13,215,012.20 is: 19,822,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754,621.80 : 31,131,932.70 = 13,215,012.20 : x
  2. Step 2: Convert to fraction form
    20,754,621.80/31,131,932.70 = 13,215,012.20/x
  3. Step 3: Cross multiply
    20,754,621.80x = 31,131,932.70 × 13,215,012.20
  4. Step 4: Simplify right side
    20,754,621.80x = 411,408,870,440,078.94
  5. Step 5: Solve for x
    x = 411,408,870,440,078.94/20,754,621.80
  6. Step 6: Final answer
    x = 19,822,518.30

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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.