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Finding the Fourth Proportional to 18,643.30, 25,724.88 and 11,089.48

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Solution

The fourth proportional to 18,643.30, 25,724.88 and 11,089.48 is: 15,301.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.30 : 25,724.88 = 11,089.48 : x
  2. Step 2: Convert to fraction form
    18,643.30/25,724.88 = 11,089.48/x
  3. Step 3: Cross multiply
    18,643.30x = 25,724.88 × 11,089.48
  4. Step 4: Simplify right side
    18,643.30x = 285,275,542.26
  5. Step 5: Solve for x
    x = 285,275,542.26/18,643.30
  6. Step 6: Final answer
    x = 15,301.77

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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.