Home / 19,313,139.80-28,969,709.70-12,129,719.60

Finding the Fourth Proportional to 19,313,139.80, 28,969,709.70 and 12,129,719.60

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Solution

The fourth proportional to 19,313,139.80, 28,969,709.70 and 12,129,719.60 is: 18,194,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313,139.80 : 28,969,709.70 = 12,129,719.60 : x
  2. Step 2: Convert to fraction form
    19,313,139.80/28,969,709.70 = 12,129,719.60/x
  3. Step 3: Cross multiply
    19,313,139.80x = 28,969,709.70 × 12,129,719.60
  4. Step 4: Simplify right side
    19,313,139.80x = 351,394,455,554,400.12
  5. Step 5: Solve for x
    x = 351,394,455,554,400.12/19,313,139.80
  6. Step 6: Final answer
    x = 18,194,579.40

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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.