Home / 20,286.70-30,415.65-7,801.90

Finding the Fourth Proportional to 20,286.70, 30,415.65 and 7,801.90

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Solution

The fourth proportional to 20,286.70, 30,415.65 and 7,801.90 is: 11,697.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.70 : 30,415.65 = 7,801.90 : x
  2. Step 2: Convert to fraction form
    20,286.70/30,415.65 = 7,801.90/x
  3. Step 3: Cross multiply
    20,286.70x = 30,415.65 × 7,801.90
  4. Step 4: Simplify right side
    20,286.70x = 237,299,859.74
  5. Step 5: Solve for x
    x = 237,299,859.74/20,286.70
  6. Step 6: Final answer
    x = 11,697.31

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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.