Home / 13,939.56-19,236.88-7,889.80

Finding the Fourth Proportional to 13,939.56, 19,236.88 and 7,889.80

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Solution

The fourth proportional to 13,939.56, 19,236.88 and 7,889.80 is: 10,888.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.56 : 19,236.88 = 7,889.80 : x
  2. Step 2: Convert to fraction form
    13,939.56/19,236.88 = 7,889.80/x
  3. Step 3: Cross multiply
    13,939.56x = 19,236.88 × 7,889.80
  4. Step 4: Simplify right side
    13,939.56x = 151,775,048.28
  5. Step 5: Solve for x
    x = 151,775,048.28/13,939.56
  6. Step 6: Final answer
    x = 10,888.08

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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.