Home / 28,507.85-39,331.20-18,449

Finding the Fourth Proportional to 28,507.85, 39,331.20 and 18,449

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Solution

The fourth proportional to 28,507.85, 39,331.20 and 18,449 is: 25,453.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.85 : 39,331.20 = 18,449 : x
  2. Step 2: Convert to fraction form
    28,507.85/39,331.20 = 18,449/x
  3. Step 3: Cross multiply
    28,507.85x = 39,331.20 × 18,449
  4. Step 4: Simplify right side
    28,507.85x = 725,621,308.80
  5. Step 5: Solve for x
    x = 725,621,308.80/28,507.85
  6. Step 6: Final answer
    x = 25,453.39

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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.