Home / 13,238.10-18,268.56-7,188.30

Finding the Fourth Proportional to 13,238.10, 18,268.56 and 7,188.30

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Solution

The fourth proportional to 13,238.10, 18,268.56 and 7,188.30 is: 9,919.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,238.10 : 18,268.56 = 7,188.30 : x
  2. Step 2: Convert to fraction form
    13,238.10/18,268.56 = 7,188.30/x
  3. Step 3: Cross multiply
    13,238.10x = 18,268.56 × 7,188.30
  4. Step 4: Simplify right side
    13,238.10x = 131,319,889.85
  5. Step 5: Solve for x
    x = 131,319,889.85/13,238.10
  6. Step 6: Final answer
    x = 9,919.84

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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.