Home / 21,075.91-31,629.45-9,982.65

Finding the Fourth Proportional to 21,075.91, 31,629.45 and 9,982.65

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Solution

The fourth proportional to 21,075.91, 31,629.45 and 9,982.65 is: 14,981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.91 : 31,629.45 = 9,982.65 : x
  2. Step 2: Convert to fraction form
    21,075.91/31,629.45 = 9,982.65/x
  3. Step 3: Cross multiply
    21,075.91x = 31,629.45 × 9,982.65
  4. Step 4: Simplify right side
    21,075.91x = 315,745,885.09
  5. Step 5: Solve for x
    x = 315,745,885.09/21,075.91
  6. Step 6: Final answer
    x = 14,981.37

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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.