Home / 13,126.05-18,114.30-7,157.97

Finding the Fourth Proportional to 13,126.05, 18,114.30 and 7,157.97

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Solution

The fourth proportional to 13,126.05, 18,114.30 and 7,157.97 is: 9,878.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.05 : 18,114.30 = 7,157.97 : x
  2. Step 2: Convert to fraction form
    13,126.05/18,114.30 = 7,157.97/x
  3. Step 3: Cross multiply
    13,126.05x = 18,114.30 × 7,157.97
  4. Step 4: Simplify right side
    13,126.05x = 129,661,615.97
  5. Step 5: Solve for x
    x = 129,661,615.97/13,126.05
  6. Step 6: Final answer
    x = 9,878.19

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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.