Home / 3,650.40-5,431.75-3,638.07

Finding the Fourth Proportional to 3,650.40, 5,431.75 and 3,638.07

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Solution

The fourth proportional to 3,650.40, 5,431.75 and 3,638.07 is: 5,413.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,650.40 : 5,431.75 = 3,638.07 : x
  2. Step 2: Convert to fraction form
    3,650.40/5,431.75 = 3,638.07/x
  3. Step 3: Cross multiply
    3,650.40x = 5,431.75 × 3,638.07
  4. Step 4: Simplify right side
    3,650.40x = 19,761,077.63
  5. Step 5: Solve for x
    x = 19,761,077.63/3,650.40
  6. Step 6: Final answer
    x = 5,413.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.