Home / 21,317.65-31,965.83-12,436.04

Finding the Fourth Proportional to 21,317.65, 31,965.83 and 12,436.04

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Solution

The fourth proportional to 21,317.65, 31,965.83 and 12,436.04 is: 18,647.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.65 : 31,965.83 = 12,436.04 : x
  2. Step 2: Convert to fraction form
    21,317.65/31,965.83 = 12,436.04/x
  3. Step 3: Cross multiply
    21,317.65x = 31,965.83 × 12,436.04
  4. Step 4: Simplify right side
    21,317.65x = 397,528,165.14
  5. Step 5: Solve for x
    x = 397,528,165.14/21,317.65
  6. Step 6: Final answer
    x = 18,647.84

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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.