Home / 21,401.54-32,039.85-12,489.56

Finding the Fourth Proportional to 21,401.54, 32,039.85 and 12,489.56

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Solution

The fourth proportional to 21,401.54, 32,039.85 and 12,489.56 is: 18,697.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,401.54 : 32,039.85 = 12,489.56 : x
  2. Step 2: Convert to fraction form
    21,401.54/32,039.85 = 12,489.56/x
  3. Step 3: Cross multiply
    21,401.54x = 32,039.85 × 12,489.56
  4. Step 4: Simplify right side
    21,401.54x = 400,163,628.97
  5. Step 5: Solve for x
    x = 400,163,628.97/21,401.54
  6. Step 6: Final answer
    x = 18,697.89

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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.