Home / 13,121.52-18,107.18-7,153.06

Finding the Fourth Proportional to 13,121.52, 18,107.18 and 7,153.06

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Solution

The fourth proportional to 13,121.52, 18,107.18 and 7,153.06 is: 9,870.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.52 : 18,107.18 = 7,153.06 : x
  2. Step 2: Convert to fraction form
    13,121.52/18,107.18 = 7,153.06/x
  3. Step 3: Cross multiply
    13,121.52x = 18,107.18 × 7,153.06
  4. Step 4: Simplify right side
    13,121.52x = 129,521,744.97
  5. Step 5: Solve for x
    x = 129,521,744.97/13,121.52
  6. Step 6: Final answer
    x = 9,870.94

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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.