Home / 20,681,356.70-31,022,035.06-18,889,766.30

Finding the Fourth Proportional to 20,681,356.70, 31,022,035.06 and 18,889,766.30

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Solution

The fourth proportional to 20,681,356.70, 31,022,035.06 and 18,889,766.30 is: 28,334,649.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681,356.70 : 31,022,035.06 = 18,889,766.30 : x
  2. Step 2: Convert to fraction form
    20,681,356.70/31,022,035.06 = 18,889,766.30/x
  3. Step 3: Cross multiply
    20,681,356.70x = 31,022,035.06 × 18,889,766.30
  4. Step 4: Simplify right side
    20,681,356.70x = 585,998,992,433,806.50
  5. Step 5: Solve for x
    x = 585,998,992,433,806.50/20,681,356.70
  6. Step 6: Final answer
    x = 28,334,649.46

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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.