Home / 28,718.87-39,626.18-16,779.90

Finding the Fourth Proportional to 28,718.87, 39,626.18 and 16,779.90

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Solution

The fourth proportional to 28,718.87, 39,626.18 and 16,779.90 is: 23,152.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.87 : 39,626.18 = 16,779.90 : x
  2. Step 2: Convert to fraction form
    28,718.87/39,626.18 = 16,779.90/x
  3. Step 3: Cross multiply
    28,718.87x = 39,626.18 × 16,779.90
  4. Step 4: Simplify right side
    28,718.87x = 664,923,055.75
  5. Step 5: Solve for x
    x = 664,923,055.75/28,718.87
  6. Step 6: Final answer
    x = 23,152.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.