Home / 21,385.41-29,511.91-11,825.99

Finding the Fourth Proportional to 21,385.41, 29,511.91 and 11,825.99

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Solution

The fourth proportional to 21,385.41, 29,511.91 and 11,825.99 is: 16,319.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.41 : 29,511.91 = 11,825.99 : x
  2. Step 2: Convert to fraction form
    21,385.41/29,511.91 = 11,825.99/x
  3. Step 3: Cross multiply
    21,385.41x = 29,511.91 × 11,825.99
  4. Step 4: Simplify right side
    21,385.41x = 349,007,552.54
  5. Step 5: Solve for x
    x = 349,007,552.54/21,385.41
  6. Step 6: Final answer
    x = 16,319.89

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1.5x scale

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.