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Finding the Fourth Proportional to 11,877.17, 16,390.42 and 6,839.51

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Solution

The fourth proportional to 11,877.17, 16,390.42 and 6,839.51 is: 9,438.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,877.17 : 16,390.42 = 6,839.51 : x
  2. Step 2: Convert to fraction form
    11,877.17/16,390.42 = 6,839.51/x
  3. Step 3: Cross multiply
    11,877.17x = 16,390.42 × 6,839.51
  4. Step 4: Simplify right side
    11,877.17x = 112,102,342.44
  5. Step 5: Solve for x
    x = 112,102,342.44/11,877.17
  6. Step 6: Final answer
    x = 9,438.48

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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.