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Finding the Fourth Proportional to 14,334.93, 19,781.64 and 7,961.79

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Solution

The fourth proportional to 14,334.93, 19,781.64 and 7,961.79 is: 10,986.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,334.93 : 19,781.64 = 7,961.79 : x
  2. Step 2: Convert to fraction form
    14,334.93/19,781.64 = 7,961.79/x
  3. Step 3: Cross multiply
    14,334.93x = 19,781.64 × 7,961.79
  4. Step 4: Simplify right side
    14,334.93x = 157,497,263.54
  5. Step 5: Solve for x
    x = 157,497,263.54/14,334.93
  6. Step 6: Final answer
    x = 10,986.96

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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.