Home / 13,126.62-18,114.37-7,158.28

Finding the Fourth Proportional to 13,126.62, 18,114.37 and 7,158.28

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Solution

The fourth proportional to 13,126.62, 18,114.37 and 7,158.28 is: 9,878.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.62 : 18,114.37 = 7,158.28 : x
  2. Step 2: Convert to fraction form
    13,126.62/18,114.37 = 7,158.28/x
  3. Step 3: Cross multiply
    13,126.62x = 18,114.37 × 7,158.28
  4. Step 4: Simplify right side
    13,126.62x = 129,667,732.48
  5. Step 5: Solve for x
    x = 129,667,732.48/13,126.62
  6. Step 6: Final answer
    x = 9,878.23

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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.