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Finding the Fourth Proportional to 17,891.80, 26,838.30 and 4,745.50

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Solution

The fourth proportional to 17,891.80, 26,838.30 and 4,745.50 is: 7,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,891.80 : 26,838.30 = 4,745.50 : x
  2. Step 2: Convert to fraction form
    17,891.80/26,838.30 = 4,745.50/x
  3. Step 3: Cross multiply
    17,891.80x = 26,838.30 × 4,745.50
  4. Step 4: Simplify right side
    17,891.80x = 127,361,018.46
  5. Step 5: Solve for x
    x = 127,361,018.46/17,891.80
  6. Step 6: Final answer
    x = 7,118.40

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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.