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Finding the Fourth Proportional to 12,889.80, 19,334.70 and 11,302.60

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Solution

The fourth proportional to 12,889.80, 19,334.70 and 11,302.60 is: 16,953.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.80 : 19,334.70 = 11,302.60 : x
  2. Step 2: Convert to fraction form
    12,889.80/19,334.70 = 11,302.60/x
  3. Step 3: Cross multiply
    12,889.80x = 19,334.70 × 11,302.60
  4. Step 4: Simplify right side
    12,889.80x = 218,532,380.22
  5. Step 5: Solve for x
    x = 218,532,380.22/12,889.80
  6. Step 6: Final answer
    x = 16,953.90

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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.