Home / 20,890,326.41-28,828,754.79-13,054,388.74

Finding the Fourth Proportional to 20,890,326.41, 28,828,754.79 and 13,054,388.74

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Solution

The fourth proportional to 20,890,326.41, 28,828,754.79 and 13,054,388.74 is: 18,015,121.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890,326.41 : 28,828,754.79 = 13,054,388.74 : x
  2. Step 2: Convert to fraction form
    20,890,326.41/28,828,754.79 = 13,054,388.74/x
  3. Step 3: Cross multiply
    20,890,326.41x = 28,828,754.79 × 13,054,388.74
  4. Step 4: Simplify right side
    20,890,326.41x = 376,341,771,846,725.19
  5. Step 5: Solve for x
    x = 376,341,771,846,725.19/20,890,326.41
  6. Step 6: Final answer
    x = 18,015,121.66

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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.