Home / 21,223,474.20-31,761,728.10-12,709,920.60

Finding the Fourth Proportional to 21,223,474.20, 31,761,728.10 and 12,709,920.60

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Solution

The fourth proportional to 21,223,474.20, 31,761,728.10 and 12,709,920.60 is: 19,020,874.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223,474.20 : 31,761,728.10 = 12,709,920.60 : x
  2. Step 2: Convert to fraction form
    21,223,474.20/31,761,728.10 = 12,709,920.60/x
  3. Step 3: Cross multiply
    21,223,474.20x = 31,761,728.10 × 12,709,920.60
  4. Step 4: Simplify right side
    21,223,474.20x = 403,689,042,269,788.88
  5. Step 5: Solve for x
    x = 403,689,042,269,788.88/21,223,474.20
  6. Step 6: Final answer
    x = 19,020,874.64

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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.