Home / 21,211-29,271.18-12,379

Finding the Fourth Proportional to 21,211, 29,271.18 and 12,379

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Solution

The fourth proportional to 21,211, 29,271.18 and 12,379 is: 17,083.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211 : 29,271.18 = 12,379 : x
  2. Step 2: Convert to fraction form
    21,211/29,271.18 = 12,379/x
  3. Step 3: Cross multiply
    21,211x = 29,271.18 × 12,379
  4. Step 4: Simplify right side
    21,211x = 362,347,937.22
  5. Step 5: Solve for x
    x = 362,347,937.22/21,211
  6. Step 6: Final answer
    x = 17,083.02

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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.