Home / 21,311.19-31,965.64-6,520.11

Finding the Fourth Proportional to 21,311.19, 31,965.64 and 6,520.11

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Solution

The fourth proportional to 21,311.19, 31,965.64 and 6,520.11 is: 9,779.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.19 : 31,965.64 = 6,520.11 : x
  2. Step 2: Convert to fraction form
    21,311.19/31,965.64 = 6,520.11/x
  3. Step 3: Cross multiply
    21,311.19x = 31,965.64 × 6,520.11
  4. Step 4: Simplify right side
    21,311.19x = 208,419,472.72
  5. Step 5: Solve for x
    x = 208,419,472.72/21,311.19
  6. Step 6: Final answer
    x = 9,779.81

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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.