Home / 12,420.73-17,143.82-8,644.51

Finding the Fourth Proportional to 12,420.73, 17,143.82 and 8,644.51

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Solution

The fourth proportional to 12,420.73, 17,143.82 and 8,644.51 is: 11,931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.73 : 17,143.82 = 8,644.51 : x
  2. Step 2: Convert to fraction form
    12,420.73/17,143.82 = 8,644.51/x
  3. Step 3: Cross multiply
    12,420.73x = 17,143.82 × 8,644.51
  4. Step 4: Simplify right side
    12,420.73x = 148,199,923.43
  5. Step 5: Solve for x
    x = 148,199,923.43/12,420.73
  6. Step 6: Final answer
    x = 11,931.66

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Similar ratio
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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.