Home / 15,782.11-21,779.26-8,708.54

Finding the Fourth Proportional to 15,782.11, 21,779.26 and 8,708.54

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Solution

The fourth proportional to 15,782.11, 21,779.26 and 8,708.54 is: 12,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.11 : 21,779.26 = 8,708.54 : x
  2. Step 2: Convert to fraction form
    15,782.11/21,779.26 = 8,708.54/x
  3. Step 3: Cross multiply
    15,782.11x = 21,779.26 × 8,708.54
  4. Step 4: Simplify right side
    15,782.11x = 189,665,556.88
  5. Step 5: Solve for x
    x = 189,665,556.88/15,782.11
  6. Step 6: Final answer
    x = 12,017.76

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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.