Home / 21,009.85-31,485.07-11,653.99

Finding the Fourth Proportional to 21,009.85, 31,485.07 and 11,653.99

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Solution

The fourth proportional to 21,009.85, 31,485.07 and 11,653.99 is: 17,464.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.85 : 31,485.07 = 11,653.99 : x
  2. Step 2: Convert to fraction form
    21,009.85/31,485.07 = 11,653.99/x
  3. Step 3: Cross multiply
    21,009.85x = 31,485.07 × 11,653.99
  4. Step 4: Simplify right side
    21,009.85x = 366,926,690.93
  5. Step 5: Solve for x
    x = 366,926,690.93/21,009.85
  6. Step 6: Final answer
    x = 17,464.51

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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.