Home / 21,391.84-29,518.86-11,958.58

Finding the Fourth Proportional to 21,391.84, 29,518.86 and 11,958.58

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Solution

The fourth proportional to 21,391.84, 29,518.86 and 11,958.58 is: 16,501.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.84 : 29,518.86 = 11,958.58 : x
  2. Step 2: Convert to fraction form
    21,391.84/29,518.86 = 11,958.58/x
  3. Step 3: Cross multiply
    21,391.84x = 29,518.86 × 11,958.58
  4. Step 4: Simplify right side
    21,391.84x = 353,003,648.82
  5. Step 5: Solve for x
    x = 353,003,648.82/21,391.84
  6. Step 6: Final answer
    x = 16,501.79

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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.