Home / 21,418.70-29,556.16-11,985.98

Finding the Fourth Proportional to 21,418.70, 29,556.16 and 11,985.98

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Solution

The fourth proportional to 21,418.70, 29,556.16 and 11,985.98 is: 16,539.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.70 : 29,556.16 = 11,985.98 : x
  2. Step 2: Convert to fraction form
    21,418.70/29,556.16 = 11,985.98/x
  3. Step 3: Cross multiply
    21,418.70x = 29,556.16 × 11,985.98
  4. Step 4: Simplify right side
    21,418.70x = 354,259,364.89
  5. Step 5: Solve for x
    x = 354,259,364.89/21,418.70
  6. Step 6: Final answer
    x = 16,539.73

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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.