Home / 13,205.14-18,224.67-8,172.70

Finding the Fourth Proportional to 13,205.14, 18,224.67 and 8,172.70

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Solution

The fourth proportional to 13,205.14, 18,224.67 and 8,172.70 is: 11,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.14 : 18,224.67 = 8,172.70 : x
  2. Step 2: Convert to fraction form
    13,205.14/18,224.67 = 8,172.70/x
  3. Step 3: Cross multiply
    13,205.14x = 18,224.67 × 8,172.70
  4. Step 4: Simplify right side
    13,205.14x = 148,944,760.51
  5. Step 5: Solve for x
    x = 148,944,760.51/13,205.14
  6. Step 6: Final answer
    x = 11,279.30

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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.