Home / 21,003,906.96-28,990,784.52-13,679,990.64

Finding the Fourth Proportional to 21,003,906.96, 28,990,784.52 and 13,679,990.64

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Solution

The fourth proportional to 21,003,906.96, 28,990,784.52 and 13,679,990.64 is: 18,881,899.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003,906.96 : 28,990,784.52 = 13,679,990.64 : x
  2. Step 2: Convert to fraction form
    21,003,906.96/28,990,784.52 = 13,679,990.64/x
  3. Step 3: Cross multiply
    21,003,906.96x = 28,990,784.52 × 13,679,990.64
  4. Step 4: Simplify right side
    21,003,906.96x = 396,593,660,879,856.88
  5. Step 5: Solve for x
    x = 396,593,660,879,856.88/21,003,906.96
  6. Step 6: Final answer
    x = 18,881,899.53

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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.