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Finding the Fourth Proportional to 18,991, 26,208.12 and 10,608.04

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Solution

The fourth proportional to 18,991, 26,208.12 and 10,608.04 is: 14,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991 : 26,208.12 = 10,608.04 : x
  2. Step 2: Convert to fraction form
    18,991/26,208.12 = 10,608.04/x
  3. Step 3: Cross multiply
    18,991x = 26,208.12 × 10,608.04
  4. Step 4: Simplify right side
    18,991x = 278,016,785.28
  5. Step 5: Solve for x
    x = 278,016,785.28/18,991
  6. Step 6: Final answer
    x = 14,639.40

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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.