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Finding the Fourth Proportional to 28,613.38, 42,919.26 and 7,836.88

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Solution

The fourth proportional to 28,613.38, 42,919.26 and 7,836.88 is: 11,755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.38 : 42,919.26 = 7,836.88 : x
  2. Step 2: Convert to fraction form
    28,613.38/42,919.26 = 7,836.88/x
  3. Step 3: Cross multiply
    28,613.38x = 42,919.26 × 7,836.88
  4. Step 4: Simplify right side
    28,613.38x = 336,353,090.31
  5. Step 5: Solve for x
    x = 336,353,090.31/28,613.38
  6. Step 6: Final answer
    x = 11,755.10

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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.