Home / 21,321.42-29,423.79-11,890.14

Finding the Fourth Proportional to 21,321.42, 29,423.79 and 11,890.14

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Solution

The fourth proportional to 21,321.42, 29,423.79 and 11,890.14 is: 16,408.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.42 : 29,423.79 = 11,890.14 : x
  2. Step 2: Convert to fraction form
    21,321.42/29,423.79 = 11,890.14/x
  3. Step 3: Cross multiply
    21,321.42x = 29,423.79 × 11,890.14
  4. Step 4: Simplify right side
    21,321.42x = 349,852,982.43
  5. Step 5: Solve for x
    x = 349,852,982.43/21,321.42
  6. Step 6: Final answer
    x = 16,408.52

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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.