Home / 28,679.68-39,578.70-18,612.28

Finding the Fourth Proportional to 28,679.68, 39,578.70 and 18,612.28

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Solution

The fourth proportional to 28,679.68, 39,578.70 and 18,612.28 is: 25,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.68 : 39,578.70 = 18,612.28 : x
  2. Step 2: Convert to fraction form
    28,679.68/39,578.70 = 18,612.28/x
  3. Step 3: Cross multiply
    28,679.68x = 39,578.70 × 18,612.28
  4. Step 4: Simplify right side
    28,679.68x = 736,649,846.44
  5. Step 5: Solve for x
    x = 736,649,846.44/28,679.68
  6. Step 6: Final answer
    x = 25,685.43

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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.