Home / 21,025,907.40-31,538,861.10-12,806,286.60

Finding the Fourth Proportional to 21,025,907.40, 31,538,861.10 and 12,806,286.60

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Solution

The fourth proportional to 21,025,907.40, 31,538,861.10 and 12,806,286.60 is: 19,209,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025,907.40 : 31,538,861.10 = 12,806,286.60 : x
  2. Step 2: Convert to fraction form
    21,025,907.40/31,538,861.10 = 12,806,286.60/x
  3. Step 3: Cross multiply
    21,025,907.40x = 31,538,861.10 × 12,806,286.60
  4. Step 4: Simplify right side
    21,025,907.40x = 403,895,694,284,191.25
  5. Step 5: Solve for x
    x = 403,895,694,284,191.25/21,025,907.40
  6. Step 6: Final answer
    x = 19,209,429.90

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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.