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Finding the Fourth Proportional to 18,765.91, 25,896.75 and 10,268.20

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Solution

The fourth proportional to 18,765.91, 25,896.75 and 10,268.20 is: 14,170.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.91 : 25,896.75 = 10,268.20 : x
  2. Step 2: Convert to fraction form
    18,765.91/25,896.75 = 10,268.20/x
  3. Step 3: Cross multiply
    18,765.91x = 25,896.75 × 10,268.20
  4. Step 4: Simplify right side
    18,765.91x = 265,913,008.35
  5. Step 5: Solve for x
    x = 265,913,008.35/18,765.91
  6. Step 6: Final answer
    x = 14,170.00

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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.