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Finding the Fourth Proportional to 12,835.81, 17,711.61 and 7,169.77

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Solution

The fourth proportional to 12,835.81, 17,711.61 and 7,169.77 is: 9,893.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,835.81 : 17,711.61 = 7,169.77 : x
  2. Step 2: Convert to fraction form
    12,835.81/17,711.61 = 7,169.77/x
  3. Step 3: Cross multiply
    12,835.81x = 17,711.61 × 7,169.77
  4. Step 4: Simplify right side
    12,835.81x = 126,988,170.03
  5. Step 5: Solve for x
    x = 126,988,170.03/12,835.81
  6. Step 6: Final answer
    x = 9,893.27

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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.