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Finding the Fourth Proportional to 17,778.80, 26,643.90 and 11,838.80

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Solution

The fourth proportional to 17,778.80, 26,643.90 and 11,838.80 is: 17,742.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,778.80 : 26,643.90 = 11,838.80 : x
  2. Step 2: Convert to fraction form
    17,778.80/26,643.90 = 11,838.80/x
  3. Step 3: Cross multiply
    17,778.80x = 26,643.90 × 11,838.80
  4. Step 4: Simplify right side
    17,778.80x = 315,431,803.32
  5. Step 5: Solve for x
    x = 315,431,803.32/17,778.80
  6. Step 6: Final answer
    x = 17,742.02

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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.