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Finding the Fourth Proportional to 18,728.55, 28,074.43 and 9,354.52

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Solution

The fourth proportional to 18,728.55, 28,074.43 and 9,354.52 is: 14,022.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.55 : 28,074.43 = 9,354.52 : x
  2. Step 2: Convert to fraction form
    18,728.55/28,074.43 = 9,354.52/x
  3. Step 3: Cross multiply
    18,728.55x = 28,074.43 × 9,354.52
  4. Step 4: Simplify right side
    18,728.55x = 262,622,863.71
  5. Step 5: Solve for x
    x = 262,622,863.71/18,728.55
  6. Step 6: Final answer
    x = 14,022.59

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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.