Home / 13,128.96-18,121.41-7,467.02

Finding the Fourth Proportional to 13,128.96, 18,121.41 and 7,467.02

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Solution

The fourth proportional to 13,128.96, 18,121.41 and 7,467.02 is: 10,306.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.96 : 18,121.41 = 7,467.02 : x
  2. Step 2: Convert to fraction form
    13,128.96/18,121.41 = 7,467.02/x
  3. Step 3: Cross multiply
    13,128.96x = 18,121.41 × 7,467.02
  4. Step 4: Simplify right side
    13,128.96x = 135,312,930.90
  5. Step 5: Solve for x
    x = 135,312,930.90/13,128.96
  6. Step 6: Final answer
    x = 10,306.45

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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.