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Finding the Fourth Proportional to 12,909.66, 17,801.09 and 8,923.85

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Solution

The fourth proportional to 12,909.66, 17,801.09 and 8,923.85 is: 12,305.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.66 : 17,801.09 = 8,923.85 : x
  2. Step 2: Convert to fraction form
    12,909.66/17,801.09 = 8,923.85/x
  3. Step 3: Cross multiply
    12,909.66x = 17,801.09 × 8,923.85
  4. Step 4: Simplify right side
    12,909.66x = 158,854,323.81
  5. Step 5: Solve for x
    x = 158,854,323.81/12,909.66
  6. Step 6: Final answer
    x = 12,305.07

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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.