Home / 20,920,986.33-31,289,695.92-18,631,622.58

Finding the Fourth Proportional to 20,920,986.33, 31,289,695.92 and 18,631,622.58

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Solution

The fourth proportional to 20,920,986.33, 31,289,695.92 and 18,631,622.58 is: 27,865,694.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920,986.33 : 31,289,695.92 = 18,631,622.58 : x
  2. Step 2: Convert to fraction form
    20,920,986.33/31,289,695.92 = 18,631,622.58/x
  3. Step 3: Cross multiply
    20,920,986.33x = 31,289,695.92 × 18,631,622.58
  4. Step 4: Simplify right side
    20,920,986.33x = 582,977,805,024,405.88
  5. Step 5: Solve for x
    x = 582,977,805,024,405.88/20,920,986.33
  6. Step 6: Final answer
    x = 27,865,694.08

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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.