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Finding the Fourth Proportional to 35,879.28, 53,819.12 and 12,505.60

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Solution

The fourth proportional to 35,879.28, 53,819.12 and 12,505.60 is: 18,758.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,879.28 : 53,819.12 = 12,505.60 : x
  2. Step 2: Convert to fraction form
    35,879.28/53,819.12 = 12,505.60/x
  3. Step 3: Cross multiply
    35,879.28x = 53,819.12 × 12,505.60
  4. Step 4: Simplify right side
    35,879.28x = 673,040,387.07
  5. Step 5: Solve for x
    x = 673,040,387.07/35,879.28
  6. Step 6: Final answer
    x = 18,758.47

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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.