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Finding the Fourth Proportional to 8,805.70, 13,190.15 and 4,129.70

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Solution

The fourth proportional to 8,805.70, 13,190.15 and 4,129.70 is: 6,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.70 : 13,190.15 = 4,129.70 : x
  2. Step 2: Convert to fraction form
    8,805.70/13,190.15 = 4,129.70/x
  3. Step 3: Cross multiply
    8,805.70x = 13,190.15 × 4,129.70
  4. Step 4: Simplify right side
    8,805.70x = 54,471,362.46
  5. Step 5: Solve for x
    x = 54,471,362.46/8,805.70
  6. Step 6: Final answer
    x = 6,185.92

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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.