Home / 3,918.51-5,407.70-2,239.92

Finding the Fourth Proportional to 3,918.51, 5,407.70 and 2,239.92

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Solution

The fourth proportional to 3,918.51, 5,407.70 and 2,239.92 is: 3,091.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.51 : 5,407.70 = 2,239.92 : x
  2. Step 2: Convert to fraction form
    3,918.51/5,407.70 = 2,239.92/x
  3. Step 3: Cross multiply
    3,918.51x = 5,407.70 × 2,239.92
  4. Step 4: Simplify right side
    3,918.51x = 12,112,804.18
  5. Step 5: Solve for x
    x = 12,112,804.18/3,918.51
  6. Step 6: Final answer
    x = 3,091.18

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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.