Home / 30,918.88-42,668.04-16,771.60

Finding the Fourth Proportional to 30,918.88, 42,668.04 and 16,771.60

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Solution

The fourth proportional to 30,918.88, 42,668.04 and 16,771.60 is: 23,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.88 : 42,668.04 = 16,771.60 : x
  2. Step 2: Convert to fraction form
    30,918.88/42,668.04 = 16,771.60/x
  3. Step 3: Cross multiply
    30,918.88x = 42,668.04 × 16,771.60
  4. Step 4: Simplify right side
    30,918.88x = 715,611,299.66
  5. Step 5: Solve for x
    x = 715,611,299.66/30,918.88
  6. Step 6: Final answer
    x = 23,144.80

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1.5x scale

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.