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Finding the Fourth Proportional to 12,889.95, 17,796.70 and 9,900.44

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Solution

The fourth proportional to 12,889.95, 17,796.70 and 9,900.44 is: 13,669.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.95 : 17,796.70 = 9,900.44 : x
  2. Step 2: Convert to fraction form
    12,889.95/17,796.70 = 9,900.44/x
  3. Step 3: Cross multiply
    12,889.95x = 17,796.70 × 9,900.44
  4. Step 4: Simplify right side
    12,889.95x = 176,195,160.55
  5. Step 5: Solve for x
    x = 176,195,160.55/12,889.95
  6. Step 6: Final answer
    x = 13,669.19

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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.