Home / 18,861,172.70-28,268,893.95-13,387,658.45

Finding the Fourth Proportional to 18,861,172.70, 28,268,893.95 and 13,387,658.45

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Solution

The fourth proportional to 18,861,172.70, 28,268,893.95 and 13,387,658.45 is: 20,065,258.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861,172.70 : 28,268,893.95 = 13,387,658.45 : x
  2. Step 2: Convert to fraction form
    18,861,172.70/28,268,893.95 = 13,387,658.45/x
  3. Step 3: Cross multiply
    18,861,172.70x = 28,268,893.95 × 13,387,658.45
  4. Step 4: Simplify right side
    18,861,172.70x = 378,454,296,961,871.38
  5. Step 5: Solve for x
    x = 378,454,296,961,871.38/18,861,172.70
  6. Step 6: Final answer
    x = 20,065,258.03

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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.