Home / 13,138.26-18,130.87-7,170.06

Finding the Fourth Proportional to 13,138.26, 18,130.87 and 7,170.06

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Solution

The fourth proportional to 13,138.26, 18,130.87 and 7,170.06 is: 9,894.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.26 : 18,130.87 = 7,170.06 : x
  2. Step 2: Convert to fraction form
    13,138.26/18,130.87 = 7,170.06/x
  3. Step 3: Cross multiply
    13,138.26x = 18,130.87 × 7,170.06
  4. Step 4: Simplify right side
    13,138.26x = 129,999,360.39
  5. Step 5: Solve for x
    x = 129,999,360.39/13,138.26
  6. Step 6: Final answer
    x = 9,894.72

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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.