Home / 13,135.23-18,126.37-7,166.75

Finding the Fourth Proportional to 13,135.23, 18,126.37 and 7,166.75

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Solution

The fourth proportional to 13,135.23, 18,126.37 and 7,166.75 is: 9,889.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.23 : 18,126.37 = 7,166.75 : x
  2. Step 2: Convert to fraction form
    13,135.23/18,126.37 = 7,166.75/x
  3. Step 3: Cross multiply
    13,135.23x = 18,126.37 × 7,166.75
  4. Step 4: Simplify right side
    13,135.23x = 129,907,162.20
  5. Step 5: Solve for x
    x = 129,907,162.20/13,135.23
  6. Step 6: Final answer
    x = 9,889.98

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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.