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Finding the Fourth Proportional to 18,643.78, 27,965.54 and 7,550.30

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Solution

The fourth proportional to 18,643.78, 27,965.54 and 7,550.30 is: 11,325.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.78 : 27,965.54 = 7,550.30 : x
  2. Step 2: Convert to fraction form
    18,643.78/27,965.54 = 7,550.30/x
  3. Step 3: Cross multiply
    18,643.78x = 27,965.54 × 7,550.30
  4. Step 4: Simplify right side
    18,643.78x = 211,148,216.66
  5. Step 5: Solve for x
    x = 211,148,216.66/18,643.78
  6. Step 6: Final answer
    x = 11,325.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.