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Finding the Fourth Proportional to 18,745.55, 28,118.32 and 4,894.55

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Solution

The fourth proportional to 18,745.55, 28,118.32 and 4,894.55 is: 7,341.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.55 : 28,118.32 = 4,894.55 : x
  2. Step 2: Convert to fraction form
    18,745.55/28,118.32 = 4,894.55/x
  3. Step 3: Cross multiply
    18,745.55x = 28,118.32 × 4,894.55
  4. Step 4: Simplify right side
    18,745.55x = 137,626,523.16
  5. Step 5: Solve for x
    x = 137,626,523.16/18,745.55
  6. Step 6: Final answer
    x = 7,341.82

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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.