Home / 13,635.40-18,828.78-8,608.60

Finding the Fourth Proportional to 13,635.40, 18,828.78 and 8,608.60

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Solution

The fourth proportional to 13,635.40, 18,828.78 and 8,608.60 is: 11,887.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.40 : 18,828.78 = 8,608.60 : x
  2. Step 2: Convert to fraction form
    13,635.40/18,828.78 = 8,608.60/x
  3. Step 3: Cross multiply
    13,635.40x = 18,828.78 × 8,608.60
  4. Step 4: Simplify right side
    13,635.40x = 162,089,435.51
  5. Step 5: Solve for x
    x = 162,089,435.51/13,635.40
  6. Step 6: Final answer
    x = 11,887.40

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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.