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Finding the Fourth Proportional to 8,769.75, 12,101.90 and 5,187.03

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Solution

The fourth proportional to 8,769.75, 12,101.90 and 5,187.03 is: 7,157.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,769.75 : 12,101.90 = 5,187.03 : x
  2. Step 2: Convert to fraction form
    8,769.75/12,101.90 = 5,187.03/x
  3. Step 3: Cross multiply
    8,769.75x = 12,101.90 × 5,187.03
  4. Step 4: Simplify right side
    8,769.75x = 62,772,918.36
  5. Step 5: Solve for x
    x = 62,772,918.36/8,769.75
  6. Step 6: Final answer
    x = 7,157.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.