Home / 28,919.94-39,915.45-16,989.54

Finding the Fourth Proportional to 28,919.94, 39,915.45 and 16,989.54

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Solution

The fourth proportional to 28,919.94, 39,915.45 and 16,989.54 is: 23,449.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.94 : 39,915.45 = 16,989.54 : x
  2. Step 2: Convert to fraction form
    28,919.94/39,915.45 = 16,989.54/x
  3. Step 3: Cross multiply
    28,919.94x = 39,915.45 × 16,989.54
  4. Step 4: Simplify right side
    28,919.94x = 678,145,134.39
  5. Step 5: Solve for x
    x = 678,145,134.39/28,919.94
  6. Step 6: Final answer
    x = 23,449.05

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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.