Home / 20,728,132.60-31,092,198.90-9,939,880.30

Finding the Fourth Proportional to 20,728,132.60, 31,092,198.90 and 9,939,880.30

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Solution

The fourth proportional to 20,728,132.60, 31,092,198.90 and 9,939,880.30 is: 14,909,820.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728,132.60 : 31,092,198.90 = 9,939,880.30 : x
  2. Step 2: Convert to fraction form
    20,728,132.60/31,092,198.90 = 9,939,880.30/x
  3. Step 3: Cross multiply
    20,728,132.60x = 31,092,198.90 × 9,939,880.30
  4. Step 4: Simplify right side
    20,728,132.60x = 309,052,735,329,791.69
  5. Step 5: Solve for x
    x = 309,052,735,329,791.69/20,728,132.60
  6. Step 6: Final answer
    x = 14,909,820.45

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1.5x scale

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.