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Finding the Fourth Proportional to 13,679.58, 18,865.97 and 8,897.75

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Solution

The fourth proportional to 13,679.58, 18,865.97 and 8,897.75 is: 12,271.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.58 : 18,865.97 = 8,897.75 : x
  2. Step 2: Convert to fraction form
    13,679.58/18,865.97 = 8,897.75/x
  3. Step 3: Cross multiply
    13,679.58x = 18,865.97 × 8,897.75
  4. Step 4: Simplify right side
    13,679.58x = 167,864,684.57
  5. Step 5: Solve for x
    x = 167,864,684.57/13,679.58
  6. Step 6: Final answer
    x = 12,271.19

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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.