Home / 21,389.88-29,518.92-11,958.42

Finding the Fourth Proportional to 21,389.88, 29,518.92 and 11,958.42

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Solution

The fourth proportional to 21,389.88, 29,518.92 and 11,958.42 is: 16,503.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.88 : 29,518.92 = 11,958.42 : x
  2. Step 2: Convert to fraction form
    21,389.88/29,518.92 = 11,958.42/x
  3. Step 3: Cross multiply
    21,389.88x = 29,518.92 × 11,958.42
  4. Step 4: Simplify right side
    21,389.88x = 352,999,643.31
  5. Step 5: Solve for x
    x = 352,999,643.31/21,389.88
  6. Step 6: Final answer
    x = 16,503.11

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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.