Home / 20,635.20-28,465.92-13,068.80

Finding the Fourth Proportional to 20,635.20, 28,465.92 and 13,068.80

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Solution

The fourth proportional to 20,635.20, 28,465.92 and 13,068.80 is: 18,028.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.20 : 28,465.92 = 13,068.80 : x
  2. Step 2: Convert to fraction form
    20,635.20/28,465.92 = 13,068.80/x
  3. Step 3: Cross multiply
    20,635.20x = 28,465.92 × 13,068.80
  4. Step 4: Simplify right side
    20,635.20x = 372,015,415.30
  5. Step 5: Solve for x
    x = 372,015,415.30/20,635.20
  6. Step 6: Final answer
    x = 18,028.20

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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.