Home / 13,859.28-20,785.90-3,996.72

Finding the Fourth Proportional to 13,859.28, 20,785.90 and 3,996.72

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Solution

The fourth proportional to 13,859.28, 20,785.90 and 3,996.72 is: 5,994.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.28 : 20,785.90 = 3,996.72 : x
  2. Step 2: Convert to fraction form
    13,859.28/20,785.90 = 3,996.72/x
  3. Step 3: Cross multiply
    13,859.28x = 20,785.90 × 3,996.72
  4. Step 4: Simplify right side
    13,859.28x = 83,075,422.25
  5. Step 5: Solve for x
    x = 83,075,422.25/13,859.28
  6. Step 6: Final answer
    x = 5,994.21

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1.5x scale

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.