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Finding the Fourth Proportional to 17,391.88, 26,088.90 and 4,912.86

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Solution

The fourth proportional to 17,391.88, 26,088.90 and 4,912.86 is: 7,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,391.88 : 26,088.90 = 4,912.86 : x
  2. Step 2: Convert to fraction form
    17,391.88/26,088.90 = 4,912.86/x
  3. Step 3: Cross multiply
    17,391.88x = 26,088.90 × 4,912.86
  4. Step 4: Simplify right side
    17,391.88x = 128,171,113.25
  5. Step 5: Solve for x
    x = 128,171,113.25/17,391.88
  6. Step 6: Final answer
    x = 7,369.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.