Home / 20,920,983.58-31,289,691.79-18,631,619.83

Finding the Fourth Proportional to 20,920,983.58, 31,289,691.79 and 18,631,619.83

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Solution

The fourth proportional to 20,920,983.58, 31,289,691.79 and 18,631,619.83 is: 27,865,689.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920,983.58 : 31,289,691.79 = 18,631,619.83 : x
  2. Step 2: Convert to fraction form
    20,920,983.58/31,289,691.79 = 18,631,619.83/x
  3. Step 3: Cross multiply
    20,920,983.58x = 31,289,691.79 × 18,631,619.83
  4. Step 4: Simplify right side
    20,920,983.58x = 582,977,642,029,152.12
  5. Step 5: Solve for x
    x = 582,977,642,029,152.12/20,920,983.58
  6. Step 6: Final answer
    x = 27,865,689.96

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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.