Home / 13,121.48-18,107.46-7,153.16

Finding the Fourth Proportional to 13,121.48, 18,107.46 and 7,153.16

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Solution

The fourth proportional to 13,121.48, 18,107.46 and 7,153.16 is: 9,871.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.48 : 18,107.46 = 7,153.16 : x
  2. Step 2: Convert to fraction form
    13,121.48/18,107.46 = 7,153.16/x
  3. Step 3: Cross multiply
    13,121.48x = 18,107.46 × 7,153.16
  4. Step 4: Simplify right side
    13,121.48x = 129,525,558.57
  5. Step 5: Solve for x
    x = 129,525,558.57/13,121.48
  6. Step 6: Final answer
    x = 9,871.26

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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.