Home / 13,902.36-20,851.38-5,135.28

Finding the Fourth Proportional to 13,902.36, 20,851.38 and 5,135.28

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Solution

The fourth proportional to 13,902.36, 20,851.38 and 5,135.28 is: 7,702.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902.36 : 20,851.38 = 5,135.28 : x
  2. Step 2: Convert to fraction form
    13,902.36/20,851.38 = 5,135.28/x
  3. Step 3: Cross multiply
    13,902.36x = 20,851.38 × 5,135.28
  4. Step 4: Simplify right side
    13,902.36x = 107,077,674.69
  5. Step 5: Solve for x
    x = 107,077,674.69/13,902.36
  6. Step 6: Final answer
    x = 7,702.12

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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.