Home / 12,427.48-17,147.93-7,121.31

Finding the Fourth Proportional to 12,427.48, 17,147.93 and 7,121.31

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Solution

The fourth proportional to 12,427.48, 17,147.93 and 7,121.31 is: 9,826.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,427.48 : 17,147.93 = 7,121.31 : x
  2. Step 2: Convert to fraction form
    12,427.48/17,147.93 = 7,121.31/x
  3. Step 3: Cross multiply
    12,427.48x = 17,147.93 × 7,121.31
  4. Step 4: Simplify right side
    12,427.48x = 122,115,725.39
  5. Step 5: Solve for x
    x = 122,115,725.39/12,427.48
  6. Step 6: Final answer
    x = 9,826.27

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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.