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Finding the Fourth Proportional to 13,855,806.72, 19,121,679.72 and 7,660,738.80

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Solution

The fourth proportional to 13,855,806.72, 19,121,679.72 and 7,660,738.80 is: 10,572,188.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855,806.72 : 19,121,679.72 = 7,660,738.80 : x
  2. Step 2: Convert to fraction form
    13,855,806.72/19,121,679.72 = 7,660,738.80/x
  3. Step 3: Cross multiply
    13,855,806.72x = 19,121,679.72 × 7,660,738.80
  4. Step 4: Simplify right side
    13,855,806.72x = 146,486,193,752,177.12
  5. Step 5: Solve for x
    x = 146,486,193,752,177.12/13,855,806.72
  6. Step 6: Final answer
    x = 10,572,188.02

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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.