Home / 13,939.56-19,245.60-8,640

Finding the Fourth Proportional to 13,939.56, 19,245.60 and 8,640

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Solution

The fourth proportional to 13,939.56, 19,245.60 and 8,640 is: 11,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.56 : 19,245.60 = 8,640 : x
  2. Step 2: Convert to fraction form
    13,939.56/19,245.60 = 8,640/x
  3. Step 3: Cross multiply
    13,939.56x = 19,245.60 × 8,640
  4. Step 4: Simplify right side
    13,939.56x = 166,281,984
  5. Step 5: Solve for x
    x = 166,281,984/13,939.56
  6. Step 6: Final answer
    x = 11,928.78

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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.