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Finding the Fourth Proportional to 8,693.11, 13,039.67 and 3,145.42

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Solution

The fourth proportional to 8,693.11, 13,039.67 and 3,145.42 is: 4,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,693.11 : 13,039.67 = 3,145.42 : x
  2. Step 2: Convert to fraction form
    8,693.11/13,039.67 = 3,145.42/x
  3. Step 3: Cross multiply
    8,693.11x = 13,039.67 × 3,145.42
  4. Step 4: Simplify right side
    8,693.11x = 41,015,238.81
  5. Step 5: Solve for x
    x = 41,015,238.81/8,693.11
  6. Step 6: Final answer
    x = 4,718.13

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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.