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Finding the Fourth Proportional to 28,336.39, 42,509.46 and 8,616.94

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Solution

The fourth proportional to 28,336.39, 42,509.46 and 8,616.94 is: 12,926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.39 : 42,509.46 = 8,616.94 : x
  2. Step 2: Convert to fraction form
    28,336.39/42,509.46 = 8,616.94/x
  3. Step 3: Cross multiply
    28,336.39x = 42,509.46 × 8,616.94
  4. Step 4: Simplify right side
    28,336.39x = 366,301,466.25
  5. Step 5: Solve for x
    x = 366,301,466.25/28,336.39
  6. Step 6: Final answer
    x = 12,926.89

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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.