Home / 21,310.85-29,408.40-12,357.79

Finding the Fourth Proportional to 21,310.85, 29,408.40 and 12,357.79

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Solution

The fourth proportional to 21,310.85, 29,408.40 and 12,357.79 is: 17,053.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.85 : 29,408.40 = 12,357.79 : x
  2. Step 2: Convert to fraction form
    21,310.85/29,408.40 = 12,357.79/x
  3. Step 3: Cross multiply
    21,310.85x = 29,408.40 × 12,357.79
  4. Step 4: Simplify right side
    21,310.85x = 363,422,757.92
  5. Step 5: Solve for x
    x = 363,422,757.92/21,310.85
  6. Step 6: Final answer
    x = 17,053.41

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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.