Home / 28,915.72-39,899.47-16,982.90

Finding the Fourth Proportional to 28,915.72, 39,899.47 and 16,982.90

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Solution

The fourth proportional to 28,915.72, 39,899.47 and 16,982.90 is: 23,433.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.72 : 39,899.47 = 16,982.90 : x
  2. Step 2: Convert to fraction form
    28,915.72/39,899.47 = 16,982.90/x
  3. Step 3: Cross multiply
    28,915.72x = 39,899.47 × 16,982.90
  4. Step 4: Simplify right side
    28,915.72x = 677,608,709.06
  5. Step 5: Solve for x
    x = 677,608,709.06/28,915.72
  6. Step 6: Final answer
    x = 23,433.92

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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.