Home / 19,311.57-28,922.40-18,779.54

Finding the Fourth Proportional to 19,311.57, 28,922.40 and 18,779.54

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Solution

The fourth proportional to 19,311.57, 28,922.40 and 18,779.54 is: 28,125.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.57 : 28,922.40 = 18,779.54 : x
  2. Step 2: Convert to fraction form
    19,311.57/28,922.40 = 18,779.54/x
  3. Step 3: Cross multiply
    19,311.57x = 28,922.40 × 18,779.54
  4. Step 4: Simplify right side
    19,311.57x = 543,149,223.08
  5. Step 5: Solve for x
    x = 543,149,223.08/19,311.57
  6. Step 6: Final answer
    x = 28,125.59

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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.