Home / 21,317.12-29,431.32-13,766.84

Finding the Fourth Proportional to 21,317.12, 29,431.32 and 13,766.84

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Solution

The fourth proportional to 21,317.12, 29,431.32 and 13,766.84 is: 19,007.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.12 : 29,431.32 = 13,766.84 : x
  2. Step 2: Convert to fraction form
    21,317.12/29,431.32 = 13,766.84/x
  3. Step 3: Cross multiply
    21,317.12x = 29,431.32 × 13,766.84
  4. Step 4: Simplify right side
    21,317.12x = 405,176,273.43
  5. Step 5: Solve for x
    x = 405,176,273.43/21,317.12
  6. Step 6: Final answer
    x = 19,007.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.