Home / 21,986.97-30,343.50-12,423.54

Finding the Fourth Proportional to 21,986.97, 30,343.50 and 12,423.54

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Solution

The fourth proportional to 21,986.97, 30,343.50 and 12,423.54 is: 17,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.97 : 30,343.50 = 12,423.54 : x
  2. Step 2: Convert to fraction form
    21,986.97/30,343.50 = 12,423.54/x
  3. Step 3: Cross multiply
    21,986.97x = 30,343.50 × 12,423.54
  4. Step 4: Simplify right side
    21,986.97x = 376,973,685.99
  5. Step 5: Solve for x
    x = 376,973,685.99/21,986.97
  6. Step 6: Final answer
    x = 17,145.32

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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.