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Finding the Fourth Proportional to 18,643.77, 27,969.72 and 10,751.40

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Solution

The fourth proportional to 18,643.77, 27,969.72 and 10,751.40 is: 16,129.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.77 : 27,969.72 = 10,751.40 : x
  2. Step 2: Convert to fraction form
    18,643.77/27,969.72 = 10,751.40/x
  3. Step 3: Cross multiply
    18,643.77x = 27,969.72 × 10,751.40
  4. Step 4: Simplify right side
    18,643.77x = 300,713,647.61
  5. Step 5: Solve for x
    x = 300,713,647.61/18,643.77
  6. Step 6: Final answer
    x = 16,129.44

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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.