Home / 21,189.69-31,784.52-15,383.21

Finding the Fourth Proportional to 21,189.69, 31,784.52 and 15,383.21

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Solution

The fourth proportional to 21,189.69, 31,784.52 and 15,383.21 is: 23,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.69 : 31,784.52 = 15,383.21 : x
  2. Step 2: Convert to fraction form
    21,189.69/31,784.52 = 15,383.21/x
  3. Step 3: Cross multiply
    21,189.69x = 31,784.52 × 15,383.21
  4. Step 4: Simplify right side
    21,189.69x = 488,947,786.99
  5. Step 5: Solve for x
    x = 488,947,786.99/21,189.69
  6. Step 6: Final answer
    x = 23,074.80

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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.