Home / 21,012.93-31,521.21-6,969.96

Finding the Fourth Proportional to 21,012.93, 31,521.21 and 6,969.96

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Solution

The fourth proportional to 21,012.93, 31,521.21 and 6,969.96 is: 10,455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.93 : 31,521.21 = 6,969.96 : x
  2. Step 2: Convert to fraction form
    21,012.93/31,521.21 = 6,969.96/x
  3. Step 3: Cross multiply
    21,012.93x = 31,521.21 × 6,969.96
  4. Step 4: Simplify right side
    21,012.93x = 219,701,572.85
  5. Step 5: Solve for x
    x = 219,701,572.85/21,012.93
  6. Step 6: Final answer
    x = 10,455.54

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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.