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Finding the Fourth Proportional to 18,643.50, 25,728.03 and 10,260.54

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Solution

The fourth proportional to 18,643.50, 25,728.03 and 10,260.54 is: 14,159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.50 : 25,728.03 = 10,260.54 : x
  2. Step 2: Convert to fraction form
    18,643.50/25,728.03 = 10,260.54/x
  3. Step 3: Cross multiply
    18,643.50x = 25,728.03 × 10,260.54
  4. Step 4: Simplify right side
    18,643.50x = 263,983,480.94
  5. Step 5: Solve for x
    x = 263,983,480.94/18,643.50
  6. Step 6: Final answer
    x = 14,159.55

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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.