Home / 30,902,325.54-42,647,364.70-20,430,147.38

Finding the Fourth Proportional to 30,902,325.54, 42,647,364.70 and 20,430,147.38

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Solution

The fourth proportional to 30,902,325.54, 42,647,364.70 and 20,430,147.38 is: 28,195,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,902,325.54 : 42,647,364.70 = 20,430,147.38 : x
  2. Step 2: Convert to fraction form
    30,902,325.54/42,647,364.70 = 20,430,147.38/x
  3. Step 3: Cross multiply
    30,902,325.54x = 42,647,364.70 × 20,430,147.38
  4. Step 4: Simplify right side
    30,902,325.54x = 871,291,946,189,609.50
  5. Step 5: Solve for x
    x = 871,291,946,189,609.50/30,902,325.54
  6. Step 6: Final answer
    x = 28,195,028.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.