Home / 10,811.72-14,921.21-6,779.19

Finding the Fourth Proportional to 10,811.72, 14,921.21 and 6,779.19

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Solution

The fourth proportional to 10,811.72, 14,921.21 and 6,779.19 is: 9,355.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,811.72 : 14,921.21 = 6,779.19 : x
  2. Step 2: Convert to fraction form
    10,811.72/14,921.21 = 6,779.19/x
  3. Step 3: Cross multiply
    10,811.72x = 14,921.21 × 6,779.19
  4. Step 4: Simplify right side
    10,811.72x = 101,153,790.52
  5. Step 5: Solve for x
    x = 101,153,790.52/10,811.72
  6. Step 6: Final answer
    x = 9,355.94

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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.