Home / 20,157,143.82-30,217,811.40-7,858,272.30

Finding the Fourth Proportional to 20,157,143.82, 30,217,811.40 and 7,858,272.30

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Solution

The fourth proportional to 20,157,143.82, 30,217,811.40 and 7,858,272.30 is: 11,780,428.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157,143.82 : 30,217,811.40 = 7,858,272.30 : x
  2. Step 2: Convert to fraction form
    20,157,143.82/30,217,811.40 = 7,858,272.30/x
  3. Step 3: Cross multiply
    20,157,143.82x = 30,217,811.40 × 7,858,272.30
  4. Step 4: Simplify right side
    20,157,143.82x = 237,459,790,291,244.19
  5. Step 5: Solve for x
    x = 237,459,790,291,244.19/20,157,143.82
  6. Step 6: Final answer
    x = 11,780,428.44

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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.