Home / 18,970,581.18-28,453,956.71-12,861,786.25

Finding the Fourth Proportional to 18,970,581.18, 28,453,956.71 and 12,861,786.25

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Solution

The fourth proportional to 18,970,581.18, 28,453,956.71 and 12,861,786.25 is: 19,291,380.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970,581.18 : 28,453,956.71 = 12,861,786.25 : x
  2. Step 2: Convert to fraction form
    18,970,581.18/28,453,956.71 = 12,861,786.25/x
  3. Step 3: Cross multiply
    18,970,581.18x = 28,453,956.71 × 12,861,786.25
  4. Step 4: Simplify right side
    18,970,581.18x = 365,968,709,142,031.75
  5. Step 5: Solve for x
    x = 365,968,709,142,031.75/18,970,581.18
  6. Step 6: Final answer
    x = 19,291,380.99

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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.