Home / 13,324.80-18,389.12-7,661.42

Finding the Fourth Proportional to 13,324.80, 18,389.12 and 7,661.42

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Solution

The fourth proportional to 13,324.80, 18,389.12 and 7,661.42 is: 10,573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,324.80 : 18,389.12 = 7,661.42 : x
  2. Step 2: Convert to fraction form
    13,324.80/18,389.12 = 7,661.42/x
  3. Step 3: Cross multiply
    13,324.80x = 18,389.12 × 7,661.42
  4. Step 4: Simplify right side
    13,324.80x = 140,886,641.50
  5. Step 5: Solve for x
    x = 140,886,641.50/13,324.80
  6. Step 6: Final answer
    x = 10,573.27

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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.