Home / 13,121.66-18,107.84-7,153.31

Finding the Fourth Proportional to 13,121.66, 18,107.84 and 7,153.31

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Solution

The fourth proportional to 13,121.66, 18,107.84 and 7,153.31 is: 9,871.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.66 : 18,107.84 = 7,153.31 : x
  2. Step 2: Convert to fraction form
    13,121.66/18,107.84 = 7,153.31/x
  3. Step 3: Cross multiply
    13,121.66x = 18,107.84 × 7,153.31
  4. Step 4: Simplify right side
    13,121.66x = 129,530,866.64
  5. Step 5: Solve for x
    x = 129,530,866.64/13,121.66
  6. Step 6: Final answer
    x = 9,871.53

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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.