Home / 21,318.48-29,418.75-11,886.84

Finding the Fourth Proportional to 21,318.48, 29,418.75 and 11,886.84

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Solution

The fourth proportional to 21,318.48, 29,418.75 and 11,886.84 is: 16,403.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.48 : 29,418.75 = 11,886.84 : x
  2. Step 2: Convert to fraction form
    21,318.48/29,418.75 = 11,886.84/x
  3. Step 3: Cross multiply
    21,318.48x = 29,418.75 × 11,886.84
  4. Step 4: Simplify right side
    21,318.48x = 349,695,974.25
  5. Step 5: Solve for x
    x = 349,695,974.25/21,318.48
  6. Step 6: Final answer
    x = 16,403.42

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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.