Home / 18,771.66-28,138.86-10,455.48

Finding the Fourth Proportional to 18,771.66, 28,138.86 and 10,455.48

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Solution

The fourth proportional to 18,771.66, 28,138.86 and 10,455.48 is: 15,672.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.66 : 28,138.86 = 10,455.48 : x
  2. Step 2: Convert to fraction form
    18,771.66/28,138.86 = 10,455.48/x
  3. Step 3: Cross multiply
    18,771.66x = 28,138.86 × 10,455.48
  4. Step 4: Simplify right side
    18,771.66x = 294,205,287.95
  5. Step 5: Solve for x
    x = 294,205,287.95/18,771.66
  6. Step 6: Final answer
    x = 15,672.84

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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.