Home / 21,921.24-30,455.36-21,658.80

Finding the Fourth Proportional to 21,921.24, 30,455.36 and 21,658.80

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Solution

The fourth proportional to 21,921.24, 30,455.36 and 21,658.80 is: 30,090.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.24 : 30,455.36 = 21,658.80 : x
  2. Step 2: Convert to fraction form
    21,921.24/30,455.36 = 21,658.80/x
  3. Step 3: Cross multiply
    21,921.24x = 30,455.36 × 21,658.80
  4. Step 4: Simplify right side
    21,921.24x = 659,626,551.17
  5. Step 5: Solve for x
    x = 659,626,551.17/21,921.24
  6. Step 6: Final answer
    x = 30,090.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.