Home / 13,903.84-20,855.22-5,138.56

Finding the Fourth Proportional to 13,903.84, 20,855.22 and 5,138.56

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Solution

The fourth proportional to 13,903.84, 20,855.22 and 5,138.56 is: 7,707.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.84 : 20,855.22 = 5,138.56 : x
  2. Step 2: Convert to fraction form
    13,903.84/20,855.22 = 5,138.56/x
  3. Step 3: Cross multiply
    13,903.84x = 20,855.22 × 5,138.56
  4. Step 4: Simplify right side
    13,903.84x = 107,165,799.28
  5. Step 5: Solve for x
    x = 107,165,799.28/13,903.84
  6. Step 6: Final answer
    x = 7,707.64

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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.