Home / 20,644.68-28,494.20-13,571.76

Finding the Fourth Proportional to 20,644.68, 28,494.20 and 13,571.76

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Solution

The fourth proportional to 20,644.68, 28,494.20 and 13,571.76 is: 18,732.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.68 : 28,494.20 = 13,571.76 : x
  2. Step 2: Convert to fraction form
    20,644.68/28,494.20 = 13,571.76/x
  3. Step 3: Cross multiply
    20,644.68x = 28,494.20 × 13,571.76
  4. Step 4: Simplify right side
    20,644.68x = 386,716,443.79
  5. Step 5: Solve for x
    x = 386,716,443.79/20,644.68
  6. Step 6: Final answer
    x = 18,732.01

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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.