Home / 21,321.03-29,423.07-11,890.20

Finding the Fourth Proportional to 21,321.03, 29,423.07 and 11,890.20

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Solution

The fourth proportional to 21,321.03, 29,423.07 and 11,890.20 is: 16,408.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.03 : 29,423.07 = 11,890.20 : x
  2. Step 2: Convert to fraction form
    21,321.03/29,423.07 = 11,890.20/x
  3. Step 3: Cross multiply
    21,321.03x = 29,423.07 × 11,890.20
  4. Step 4: Simplify right side
    21,321.03x = 349,846,186.91
  5. Step 5: Solve for x
    x = 349,846,186.91/21,321.03
  6. Step 6: Final answer
    x = 16,408.50

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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.