Home / 13,815.89-20,723.32-3,955.15

Finding the Fourth Proportional to 13,815.89, 20,723.32 and 3,955.15

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Solution

The fourth proportional to 13,815.89, 20,723.32 and 3,955.15 is: 5,932.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.89 : 20,723.32 = 3,955.15 : x
  2. Step 2: Convert to fraction form
    13,815.89/20,723.32 = 3,955.15/x
  3. Step 3: Cross multiply
    13,815.89x = 20,723.32 × 3,955.15
  4. Step 4: Simplify right side
    13,815.89x = 81,963,839.10
  5. Step 5: Solve for x
    x = 81,963,839.10/13,815.89
  6. Step 6: Final answer
    x = 5,932.58

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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.