Home / 28,786.68-39,709.80-18,418.95

Finding the Fourth Proportional to 28,786.68, 39,709.80 and 18,418.95

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Solution

The fourth proportional to 28,786.68, 39,709.80 and 18,418.95 is: 25,408.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,786.68 : 39,709.80 = 18,418.95 : x
  2. Step 2: Convert to fraction form
    28,786.68/39,709.80 = 18,418.95/x
  3. Step 3: Cross multiply
    28,786.68x = 39,709.80 × 18,418.95
  4. Step 4: Simplify right side
    28,786.68x = 731,412,820.71
  5. Step 5: Solve for x
    x = 731,412,820.71/28,786.68
  6. Step 6: Final answer
    x = 25,408.03

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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.