Home / 20,779.24-31,150.32-7,628.56

Finding the Fourth Proportional to 20,779.24, 31,150.32 and 7,628.56

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Solution

The fourth proportional to 20,779.24, 31,150.32 and 7,628.56 is: 11,436.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.24 : 31,150.32 = 7,628.56 : x
  2. Step 2: Convert to fraction form
    20,779.24/31,150.32 = 7,628.56/x
  3. Step 3: Cross multiply
    20,779.24x = 31,150.32 × 7,628.56
  4. Step 4: Simplify right side
    20,779.24x = 237,632,085.14
  5. Step 5: Solve for x
    x = 237,632,085.14/20,779.24
  6. Step 6: Final answer
    x = 11,436.03

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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.