Home / 18,743.12-28,120.64-11,727.60

Finding the Fourth Proportional to 18,743.12, 28,120.64 and 11,727.60

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Solution

The fourth proportional to 18,743.12, 28,120.64 and 11,727.60 is: 17,595.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,743.12 : 28,120.64 = 11,727.60 : x
  2. Step 2: Convert to fraction form
    18,743.12/28,120.64 = 11,727.60/x
  3. Step 3: Cross multiply
    18,743.12x = 28,120.64 × 11,727.60
  4. Step 4: Simplify right side
    18,743.12x = 329,787,617.66
  5. Step 5: Solve for x
    x = 329,787,617.66/18,743.12
  6. Step 6: Final answer
    x = 17,595.13

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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.