Home / 13,105.60-18,085.85-7,137.30

Finding the Fourth Proportional to 13,105.60, 18,085.85 and 7,137.30

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Solution

The fourth proportional to 13,105.60, 18,085.85 and 7,137.30 is: 9,849.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.60 : 18,085.85 = 7,137.30 : x
  2. Step 2: Convert to fraction form
    13,105.60/18,085.85 = 7,137.30/x
  3. Step 3: Cross multiply
    13,105.60x = 18,085.85 × 7,137.30
  4. Step 4: Simplify right side
    13,105.60x = 129,084,137.21
  5. Step 5: Solve for x
    x = 129,084,137.21/13,105.60
  6. Step 6: Final answer
    x = 9,849.54

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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.