Home / 21,321.48-29,423.82-11,890.62

Finding the Fourth Proportional to 21,321.48, 29,423.82 and 11,890.62

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Solution

The fourth proportional to 21,321.48, 29,423.82 and 11,890.62 is: 16,409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.48 : 29,423.82 = 11,890.62 : x
  2. Step 2: Convert to fraction form
    21,321.48/29,423.82 = 11,890.62/x
  3. Step 3: Cross multiply
    21,321.48x = 29,423.82 × 11,890.62
  4. Step 4: Simplify right side
    21,321.48x = 349,867,462.57
  5. Step 5: Solve for x
    x = 349,867,462.57/21,321.48
  6. Step 6: Final answer
    x = 16,409.15

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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.