Home / 18,728.30-28,078.61-11,330.97

Finding the Fourth Proportional to 18,728.30, 28,078.61 and 11,330.97

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Solution

The fourth proportional to 18,728.30, 28,078.61 and 11,330.97 is: 16,988.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.30 : 28,078.61 = 11,330.97 : x
  2. Step 2: Convert to fraction form
    18,728.30/28,078.61 = 11,330.97/x
  3. Step 3: Cross multiply
    18,728.30x = 28,078.61 × 11,330.97
  4. Step 4: Simplify right side
    18,728.30x = 318,157,830.90
  5. Step 5: Solve for x
    x = 318,157,830.90/18,728.30
  6. Step 6: Final answer
    x = 16,988.08

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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.