Home / 21,003.69-31,511.68-6,212.99

Finding the Fourth Proportional to 21,003.69, 31,511.68 and 6,212.99

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Solution

The fourth proportional to 21,003.69, 31,511.68 and 6,212.99 is: 9,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.69 : 31,511.68 = 6,212.99 : x
  2. Step 2: Convert to fraction form
    21,003.69/31,511.68 = 6,212.99/x
  3. Step 3: Cross multiply
    21,003.69x = 31,511.68 × 6,212.99
  4. Step 4: Simplify right side
    21,003.69x = 195,781,752.72
  5. Step 5: Solve for x
    x = 195,781,752.72/21,003.69
  6. Step 6: Final answer
    x = 9,321.30

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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.