Home / 13,422.72-20,126.40-7,175.04

Finding the Fourth Proportional to 13,422.72, 20,126.40 and 7,175.04

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Solution

The fourth proportional to 13,422.72, 20,126.40 and 7,175.04 is: 10,758.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.72 : 20,126.40 = 7,175.04 : x
  2. Step 2: Convert to fraction form
    13,422.72/20,126.40 = 7,175.04/x
  3. Step 3: Cross multiply
    13,422.72x = 20,126.40 × 7,175.04
  4. Step 4: Simplify right side
    13,422.72x = 144,407,725.06
  5. Step 5: Solve for x
    x = 144,407,725.06/13,422.72
  6. Step 6: Final answer
    x = 10,758.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.