Home / 21,183.08-31,779.18-6,390.77

Finding the Fourth Proportional to 21,183.08, 31,779.18 and 6,390.77

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Solution

The fourth proportional to 21,183.08, 31,779.18 and 6,390.77 is: 9,587.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.08 : 31,779.18 = 6,390.77 : x
  2. Step 2: Convert to fraction form
    21,183.08/31,779.18 = 6,390.77/x
  3. Step 3: Cross multiply
    21,183.08x = 31,779.18 × 6,390.77
  4. Step 4: Simplify right side
    21,183.08x = 203,093,271.27
  5. Step 5: Solve for x
    x = 203,093,271.27/21,183.08
  6. Step 6: Final answer
    x = 9,587.53

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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.