Home / 13,785.50-20,661.78-5,015.64

Finding the Fourth Proportional to 13,785.50, 20,661.78 and 5,015.64

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Solution

The fourth proportional to 13,785.50, 20,661.78 and 5,015.64 is: 7,517.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.50 : 20,661.78 = 5,015.64 : x
  2. Step 2: Convert to fraction form
    13,785.50/20,661.78 = 5,015.64/x
  3. Step 3: Cross multiply
    13,785.50x = 20,661.78 × 5,015.64
  4. Step 4: Simplify right side
    13,785.50x = 103,632,050.24
  5. Step 5: Solve for x
    x = 103,632,050.24/13,785.50
  6. Step 6: Final answer
    x = 7,517.47

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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.