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Finding the Fourth Proportional to 18,728.30, 28,110.65 and 14,613.10

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Solution

The fourth proportional to 18,728.30, 28,110.65 and 14,613.10 is: 21,933.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.30 : 28,110.65 = 14,613.10 : x
  2. Step 2: Convert to fraction form
    18,728.30/28,110.65 = 14,613.10/x
  3. Step 3: Cross multiply
    18,728.30x = 28,110.65 × 14,613.10
  4. Step 4: Simplify right side
    18,728.30x = 410,783,739.52
  5. Step 5: Solve for x
    x = 410,783,739.52/18,728.30
  6. Step 6: Final answer
    x = 21,933.85

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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.