Home / 20,818.30-28,738.64-13,274.76

Finding the Fourth Proportional to 20,818.30, 28,738.64 and 13,274.76

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Solution

The fourth proportional to 20,818.30, 28,738.64 and 13,274.76 is: 18,325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.30 : 28,738.64 = 13,274.76 : x
  2. Step 2: Convert to fraction form
    20,818.30/28,738.64 = 13,274.76/x
  3. Step 3: Cross multiply
    20,818.30x = 28,738.64 × 13,274.76
  4. Step 4: Simplify right side
    20,818.30x = 381,498,548.73
  5. Step 5: Solve for x
    x = 381,498,548.73/20,818.30
  6. Step 6: Final answer
    x = 18,325.15

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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.