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Finding the Fourth Proportional to 13,616.82, 18,791.70 and 7,955.16

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Solution

The fourth proportional to 13,616.82, 18,791.70 and 7,955.16 is: 10,978.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,616.82 : 18,791.70 = 7,955.16 : x
  2. Step 2: Convert to fraction form
    13,616.82/18,791.70 = 7,955.16/x
  3. Step 3: Cross multiply
    13,616.82x = 18,791.70 × 7,955.16
  4. Step 4: Simplify right side
    13,616.82x = 149,490,980.17
  5. Step 5: Solve for x
    x = 149,490,980.17/13,616.82
  6. Step 6: Final answer
    x = 10,978.41

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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.