Home / 13,704.40-18,912.64-8,666.80

Finding the Fourth Proportional to 13,704.40, 18,912.64 and 8,666.80

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Solution

The fourth proportional to 13,704.40, 18,912.64 and 8,666.80 is: 11,960.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704.40 : 18,912.64 = 8,666.80 : x
  2. Step 2: Convert to fraction form
    13,704.40/18,912.64 = 8,666.80/x
  3. Step 3: Cross multiply
    13,704.40x = 18,912.64 × 8,666.80
  4. Step 4: Simplify right side
    13,704.40x = 163,912,068.35
  5. Step 5: Solve for x
    x = 163,912,068.35/13,704.40
  6. Step 6: Final answer
    x = 11,960.54

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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.