Home / 18,784.80-28,166.40-5,635.20

Finding the Fourth Proportional to 18,784.80, 28,166.40 and 5,635.20

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Solution

The fourth proportional to 18,784.80, 28,166.40 and 5,635.20 is: 8,449.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.80 : 28,166.40 = 5,635.20 : x
  2. Step 2: Convert to fraction form
    18,784.80/28,166.40 = 5,635.20/x
  3. Step 3: Cross multiply
    18,784.80x = 28,166.40 × 5,635.20
  4. Step 4: Simplify right side
    18,784.80x = 158,723,297.28
  5. Step 5: Solve for x
    x = 158,723,297.28/18,784.80
  6. Step 6: Final answer
    x = 8,449.56

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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.