Home / 20,739,228.39-28,612,152.86-12,990,781.35

Finding the Fourth Proportional to 20,739,228.39, 28,612,152.86 and 12,990,781.35

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Solution

The fourth proportional to 20,739,228.39, 28,612,152.86 and 12,990,781.35 is: 17,922,278.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739,228.39 : 28,612,152.86 = 12,990,781.35 : x
  2. Step 2: Convert to fraction form
    20,739,228.39/28,612,152.86 = 12,990,781.35/x
  3. Step 3: Cross multiply
    20,739,228.39x = 28,612,152.86 × 12,990,781.35
  4. Step 4: Simplify right side
    20,739,228.39x = 371,694,221,692,083.25
  5. Step 5: Solve for x
    x = 371,694,221,692,083.25/20,739,228.39
  6. Step 6: Final answer
    x = 17,922,278.24

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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.