Home / 18,745.20-28,117.77-7,657.11

Finding the Fourth Proportional to 18,745.20, 28,117.77 and 7,657.11

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Solution

The fourth proportional to 18,745.20, 28,117.77 and 7,657.11 is: 11,485.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.20 : 28,117.77 = 7,657.11 : x
  2. Step 2: Convert to fraction form
    18,745.20/28,117.77 = 7,657.11/x
  3. Step 3: Cross multiply
    18,745.20x = 28,117.77 × 7,657.11
  4. Step 4: Simplify right side
    18,745.20x = 215,300,857.84
  5. Step 5: Solve for x
    x = 215,300,857.84/18,745.20
  6. Step 6: Final answer
    x = 11,485.65

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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.