Home / 20,739,231.39-28,612,156.98-12,990,784.35

Finding the Fourth Proportional to 20,739,231.39, 28,612,156.98 and 12,990,784.35

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Solution

The fourth proportional to 20,739,231.39, 28,612,156.98 and 12,990,784.35 is: 17,922,282.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739,231.39 : 28,612,156.98 = 12,990,784.35 : x
  2. Step 2: Convert to fraction form
    20,739,231.39/28,612,156.98 = 12,990,784.35/x
  3. Step 3: Cross multiply
    20,739,231.39x = 28,612,156.98 × 12,990,784.35
  4. Step 4: Simplify right side
    20,739,231.39x = 371,694,361,115,527.25
  5. Step 5: Solve for x
    x = 371,694,361,115,527.25/20,739,231.39
  6. Step 6: Final answer
    x = 17,922,282.37

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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.