Home / 3,820.40-5,265.76-2,638.88

Finding the Fourth Proportional to 3,820.40, 5,265.76 and 2,638.88

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Solution

The fourth proportional to 3,820.40, 5,265.76 and 2,638.88 is: 3,637.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.40 : 5,265.76 = 2,638.88 : x
  2. Step 2: Convert to fraction form
    3,820.40/5,265.76 = 2,638.88/x
  3. Step 3: Cross multiply
    3,820.40x = 5,265.76 × 2,638.88
  4. Step 4: Simplify right side
    3,820.40x = 13,895,708.75
  5. Step 5: Solve for x
    x = 13,895,708.75/3,820.40
  6. Step 6: Final answer
    x = 3,637.24

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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.