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Finding the Fourth Proportional to 13,288.80, 19,894.80 and 11,906.40

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Solution

The fourth proportional to 13,288.80, 19,894.80 and 11,906.40 is: 17,825.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.80 : 19,894.80 = 11,906.40 : x
  2. Step 2: Convert to fraction form
    13,288.80/19,894.80 = 11,906.40/x
  3. Step 3: Cross multiply
    13,288.80x = 19,894.80 × 11,906.40
  4. Step 4: Simplify right side
    13,288.80x = 236,875,446.72
  5. Step 5: Solve for x
    x = 236,875,446.72/13,288.80
  6. Step 6: Final answer
    x = 17,825.19

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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.