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Finding the Fourth Proportional to 28,673.15, 42,991.09 and 9,951.75

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Solution

The fourth proportional to 28,673.15, 42,991.09 and 9,951.75 is: 14,921.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,673.15 : 42,991.09 = 9,951.75 : x
  2. Step 2: Convert to fraction form
    28,673.15/42,991.09 = 9,951.75/x
  3. Step 3: Cross multiply
    28,673.15x = 42,991.09 × 9,951.75
  4. Step 4: Simplify right side
    28,673.15x = 427,836,555.03
  5. Step 5: Solve for x
    x = 427,836,555.03/28,673.15
  6. Step 6: Final answer
    x = 14,921.16

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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.