Home / 13,677.05-20,515.34-3,815.51

Finding the Fourth Proportional to 13,677.05, 20,515.34 and 3,815.51

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Solution

The fourth proportional to 13,677.05, 20,515.34 and 3,815.51 is: 5,723.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,677.05 : 20,515.34 = 3,815.51 : x
  2. Step 2: Convert to fraction form
    13,677.05/20,515.34 = 3,815.51/x
  3. Step 3: Cross multiply
    13,677.05x = 20,515.34 × 3,815.51
  4. Step 4: Simplify right side
    13,677.05x = 78,276,391.89
  5. Step 5: Solve for x
    x = 78,276,391.89/13,677.05
  6. Step 6: Final answer
    x = 5,723.19

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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.