Home / 21,336.30-29,438.16-13,782.96

Finding the Fourth Proportional to 21,336.30, 29,438.16 and 13,782.96

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Solution

The fourth proportional to 21,336.30, 29,438.16 and 13,782.96 is: 19,016.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.30 : 29,438.16 = 13,782.96 : x
  2. Step 2: Convert to fraction form
    21,336.30/29,438.16 = 13,782.96/x
  3. Step 3: Cross multiply
    21,336.30x = 29,438.16 × 13,782.96
  4. Step 4: Simplify right side
    21,336.30x = 405,744,981.75
  5. Step 5: Solve for x
    x = 405,744,981.75/21,336.30
  6. Step 6: Final answer
    x = 19,016.65

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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.