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Finding the Fourth Proportional to 13,985,999.10, 20,978,998.65 and 10,206,863.10

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Solution

The fourth proportional to 13,985,999.10, 20,978,998.65 and 10,206,863.10 is: 15,310,294.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985,999.10 : 20,978,998.65 = 10,206,863.10 : x
  2. Step 2: Convert to fraction form
    13,985,999.10/20,978,998.65 = 10,206,863.10/x
  3. Step 3: Cross multiply
    13,985,999.10x = 20,978,998.65 × 10,206,863.10
  4. Step 4: Simplify right side
    13,985,999.10x = 214,129,767,195,634.78
  5. Step 5: Solve for x
    x = 214,129,767,195,634.78/13,985,999.10
  6. Step 6: Final answer
    x = 15,310,294.65

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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.