Home / 13,126.21-18,114.51-7,157.86

Finding the Fourth Proportional to 13,126.21, 18,114.51 and 7,157.86

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Solution

The fourth proportional to 13,126.21, 18,114.51 and 7,157.86 is: 9,878.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.21 : 18,114.51 = 7,157.86 : x
  2. Step 2: Convert to fraction form
    13,126.21/18,114.51 = 7,157.86/x
  3. Step 3: Cross multiply
    13,126.21x = 18,114.51 × 7,157.86
  4. Step 4: Simplify right side
    13,126.21x = 129,661,126.55
  5. Step 5: Solve for x
    x = 129,661,126.55/13,126.21
  6. Step 6: Final answer
    x = 9,878.03

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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.