Home / 20,157,139.82-30,217,805.40-7,858,268.30

Finding the Fourth Proportional to 20,157,139.82, 30,217,805.40 and 7,858,268.30

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Solution

The fourth proportional to 20,157,139.82, 30,217,805.40 and 7,858,268.30 is: 11,780,422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157,139.82 : 30,217,805.40 = 7,858,268.30 : x
  2. Step 2: Convert to fraction form
    20,157,139.82/30,217,805.40 = 7,858,268.30/x
  3. Step 3: Cross multiply
    20,157,139.82x = 30,217,805.40 × 7,858,268.30
  4. Step 4: Simplify right side
    20,157,139.82x = 237,459,622,270,388.81
  5. Step 5: Solve for x
    x = 237,459,622,270,388.81/20,157,139.82
  6. Step 6: Final answer
    x = 11,780,422.44

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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.