Home / 15,949.72-21,999.40-13,821.50

Finding the Fourth Proportional to 15,949.72, 21,999.40 and 13,821.50

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Solution

The fourth proportional to 15,949.72, 21,999.40 and 13,821.50 is: 19,063.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,949.72 : 21,999.40 = 13,821.50 : x
  2. Step 2: Convert to fraction form
    15,949.72/21,999.40 = 13,821.50/x
  3. Step 3: Cross multiply
    15,949.72x = 21,999.40 × 13,821.50
  4. Step 4: Simplify right side
    15,949.72x = 304,064,634.73
  5. Step 5: Solve for x
    x = 304,064,634.73/15,949.72
  6. Step 6: Final answer
    x = 19,063.94

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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.