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Finding the Fourth Proportional to 28,894.90, 43,246.35 and 20,974.90

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Solution

The fourth proportional to 28,894.90, 43,246.35 and 20,974.90 is: 31,392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,894.90 : 43,246.35 = 20,974.90 : x
  2. Step 2: Convert to fraction form
    28,894.90/43,246.35 = 20,974.90/x
  3. Step 3: Cross multiply
    28,894.90x = 43,246.35 × 20,974.90
  4. Step 4: Simplify right side
    28,894.90x = 907,087,866.62
  5. Step 5: Solve for x
    x = 907,087,866.62/28,894.90
  6. Step 6: Final answer
    x = 31,392.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.