Home / 21,307.08-31,950.25-7,982.09

Finding the Fourth Proportional to 21,307.08, 31,950.25 and 7,982.09

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Solution

The fourth proportional to 21,307.08, 31,950.25 and 7,982.09 is: 11,969.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.08 : 31,950.25 = 7,982.09 : x
  2. Step 2: Convert to fraction form
    21,307.08/31,950.25 = 7,982.09/x
  3. Step 3: Cross multiply
    21,307.08x = 31,950.25 × 7,982.09
  4. Step 4: Simplify right side
    21,307.08x = 255,029,890.85
  5. Step 5: Solve for x
    x = 255,029,890.85/21,307.08
  6. Step 6: Final answer
    x = 11,969.26

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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.