Home / 15,779.24-21,775.30-8,705.66

Finding the Fourth Proportional to 15,779.24, 21,775.30 and 8,705.66

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Solution

The fourth proportional to 15,779.24, 21,775.30 and 8,705.66 is: 12,013.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.24 : 21,775.30 = 8,705.66 : x
  2. Step 2: Convert to fraction form
    15,779.24/21,775.30 = 8,705.66/x
  3. Step 3: Cross multiply
    15,779.24x = 21,775.30 × 8,705.66
  4. Step 4: Simplify right side
    15,779.24x = 189,568,390.87
  5. Step 5: Solve for x
    x = 189,568,390.87/15,779.24
  6. Step 6: Final answer
    x = 12,013.79

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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.