Home / 21,039.79-31,529.61-15,449.27

Finding the Fourth Proportional to 21,039.79, 31,529.61 and 15,449.27

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Solution

The fourth proportional to 21,039.79, 31,529.61 and 15,449.27 is: 23,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.79 : 31,529.61 = 15,449.27 : x
  2. Step 2: Convert to fraction form
    21,039.79/31,529.61 = 15,449.27/x
  3. Step 3: Cross multiply
    21,039.79x = 31,529.61 × 15,449.27
  4. Step 4: Simplify right side
    21,039.79x = 487,109,222.99
  5. Step 5: Solve for x
    x = 487,109,222.99/21,039.79
  6. Step 6: Final answer
    x = 23,151.82

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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.