Home / 13,119.29-18,103.74-7,455.23

Finding the Fourth Proportional to 13,119.29, 18,103.74 and 7,455.23

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Solution

The fourth proportional to 13,119.29, 18,103.74 and 7,455.23 is: 10,287.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.29 : 18,103.74 = 7,455.23 : x
  2. Step 2: Convert to fraction form
    13,119.29/18,103.74 = 7,455.23/x
  3. Step 3: Cross multiply
    13,119.29x = 18,103.74 × 7,455.23
  4. Step 4: Simplify right side
    13,119.29x = 134,967,545.56
  5. Step 5: Solve for x
    x = 134,967,545.56/13,119.29
  6. Step 6: Final answer
    x = 10,287.72

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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.