Home / 20,739,232.89-28,612,159.07-12,990,785.85

Finding the Fourth Proportional to 20,739,232.89, 28,612,159.07 and 12,990,785.85

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Solution

The fourth proportional to 20,739,232.89, 28,612,159.07 and 12,990,785.85 is: 17,922,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739,232.89 : 28,612,159.07 = 12,990,785.85 : x
  2. Step 2: Convert to fraction form
    20,739,232.89/28,612,159.07 = 12,990,785.85/x
  3. Step 3: Cross multiply
    20,739,232.89x = 28,612,159.07 × 12,990,785.85
  4. Step 4: Simplify right side
    20,739,232.89x = 371,694,431,119,551.25
  5. Step 5: Solve for x
    x = 371,694,431,119,551.25/20,739,232.89
  6. Step 6: Final answer
    x = 17,922,284.45

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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.