Home / 20,681,346.70-31,022,020.06-18,889,756.30

Finding the Fourth Proportional to 20,681,346.70, 31,022,020.06 and 18,889,756.30

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Solution

The fourth proportional to 20,681,346.70, 31,022,020.06 and 18,889,756.30 is: 28,334,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681,346.70 : 31,022,020.06 = 18,889,756.30 : x
  2. Step 2: Convert to fraction form
    20,681,346.70/31,022,020.06 = 18,889,756.30/x
  3. Step 3: Cross multiply
    20,681,346.70x = 31,022,020.06 × 18,889,756.30
  4. Step 4: Simplify right side
    20,681,346.70x = 585,998,398,867,111.38
  5. Step 5: Solve for x
    x = 585,998,398,867,111.38/20,681,346.70
  6. Step 6: Final answer
    x = 28,334,634.46

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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.