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Finding the Fourth Proportional to 18,725.00, 25,781.54 and 15,886.49

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Solution

The fourth proportional to 18,725.00, 25,781.54 and 15,886.49 is: 21,873.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,725.00 : 25,781.54 = 15,886.49 : x
  2. Step 2: Convert to fraction form
    18,725.00/25,781.54 = 15,886.49/x
  3. Step 3: Cross multiply
    18,725.00x = 25,781.54 × 15,886.49
  4. Step 4: Simplify right side
    18,725.00x = 409,577,969.05
  5. Step 5: Solve for x
    x = 409,577,969.05/18,725.00
  6. Step 6: Final answer
    x = 21,873.33

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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.