Home / 13,880.13-20,786.83-7,939.01

Finding the Fourth Proportional to 13,880.13, 20,786.83 and 7,939.01

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Solution

The fourth proportional to 13,880.13, 20,786.83 and 7,939.01 is: 11,889.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.13 : 20,786.83 = 7,939.01 : x
  2. Step 2: Convert to fraction form
    13,880.13/20,786.83 = 7,939.01/x
  3. Step 3: Cross multiply
    13,880.13x = 20,786.83 × 7,939.01
  4. Step 4: Simplify right side
    13,880.13x = 165,026,851.24
  5. Step 5: Solve for x
    x = 165,026,851.24/13,880.13
  6. Step 6: Final answer
    x = 11,889.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.