Home / 13,890.92-20,821.80-8,625.92

Finding the Fourth Proportional to 13,890.92, 20,821.80 and 8,625.92

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Solution

The fourth proportional to 13,890.92, 20,821.80 and 8,625.92 is: 12,929.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.92 : 20,821.80 = 8,625.92 : x
  2. Step 2: Convert to fraction form
    13,890.92/20,821.80 = 8,625.92/x
  3. Step 3: Cross multiply
    13,890.92x = 20,821.80 × 8,625.92
  4. Step 4: Simplify right side
    13,890.92x = 179,607,181.06
  5. Step 5: Solve for x
    x = 179,607,181.06/13,890.92
  6. Step 6: Final answer
    x = 12,929.83

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1.5x scale

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.