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Finding the Fourth Proportional to 18,783.42, 28,156.42 and 9,394.79

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Solution

The fourth proportional to 18,783.42, 28,156.42 and 9,394.79 is: 14,082.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.42 : 28,156.42 = 9,394.79 : x
  2. Step 2: Convert to fraction form
    18,783.42/28,156.42 = 9,394.79/x
  3. Step 3: Cross multiply
    18,783.42x = 28,156.42 × 9,394.79
  4. Step 4: Simplify right side
    18,783.42x = 264,523,653.05
  5. Step 5: Solve for x
    x = 264,523,653.05/18,783.42
  6. Step 6: Final answer
    x = 14,082.83

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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.