Home / 13,631.16-18,811.54-7,969.56

Finding the Fourth Proportional to 13,631.16, 18,811.54 and 7,969.56

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Solution

The fourth proportional to 13,631.16, 18,811.54 and 7,969.56 is: 10,998.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.16 : 18,811.54 = 7,969.56 : x
  2. Step 2: Convert to fraction form
    13,631.16/18,811.54 = 7,969.56/x
  3. Step 3: Cross multiply
    13,631.16x = 18,811.54 × 7,969.56
  4. Step 4: Simplify right side
    13,631.16x = 149,919,696.72
  5. Step 5: Solve for x
    x = 149,919,696.72/13,631.16
  6. Step 6: Final answer
    x = 10,998.31

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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.