Home / 20,286.36-30,435.60-7,807.48

Finding the Fourth Proportional to 20,286.36, 30,435.60 and 7,807.48

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Solution

The fourth proportional to 20,286.36, 30,435.60 and 7,807.48 is: 11,713.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.36 : 30,435.60 = 7,807.48 : x
  2. Step 2: Convert to fraction form
    20,286.36/30,435.60 = 7,807.48/x
  3. Step 3: Cross multiply
    20,286.36x = 30,435.60 × 7,807.48
  4. Step 4: Simplify right side
    20,286.36x = 237,625,338.29
  5. Step 5: Solve for x
    x = 237,625,338.29/20,286.36
  6. Step 6: Final answer
    x = 11,713.55

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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.