Home / 13,940.64-19,236.89-7,971.35

Finding the Fourth Proportional to 13,940.64, 19,236.89 and 7,971.35

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Solution

The fourth proportional to 13,940.64, 19,236.89 and 7,971.35 is: 10,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.64 : 19,236.89 = 7,971.35 : x
  2. Step 2: Convert to fraction form
    13,940.64/19,236.89 = 7,971.35/x
  3. Step 3: Cross multiply
    13,940.64x = 19,236.89 × 7,971.35
  4. Step 4: Simplify right side
    13,940.64x = 153,343,906.85
  5. Step 5: Solve for x
    x = 153,343,906.85/13,940.64
  6. Step 6: Final answer
    x = 10,999.78

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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.