Home / 39,697.12-54,782.72-21,793.80

Finding the Fourth Proportional to 39,697.12, 54,782.72 and 21,793.80

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Solution

The fourth proportional to 39,697.12, 54,782.72 and 21,793.80 is: 30,075.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,697.12 : 54,782.72 = 21,793.80 : x
  2. Step 2: Convert to fraction form
    39,697.12/54,782.72 = 21,793.80/x
  3. Step 3: Cross multiply
    39,697.12x = 54,782.72 × 21,793.80
  4. Step 4: Simplify right side
    39,697.12x = 1,193,923,643.14
  5. Step 5: Solve for x
    x = 1,193,923,643.14/39,697.12
  6. Step 6: Final answer
    x = 30,075.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.