Home / 21,390.49-29,537.79-13,337.89

Finding the Fourth Proportional to 21,390.49, 29,537.79 and 13,337.89

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Solution

The fourth proportional to 21,390.49, 29,537.79 and 13,337.89 is: 18,418.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.49 : 29,537.79 = 13,337.89 : x
  2. Step 2: Convert to fraction form
    21,390.49/29,537.79 = 13,337.89/x
  3. Step 3: Cross multiply
    21,390.49x = 29,537.79 × 13,337.89
  4. Step 4: Simplify right side
    21,390.49x = 393,971,793.86
  5. Step 5: Solve for x
    x = 393,971,793.86/21,390.49
  6. Step 6: Final answer
    x = 18,418.08

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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.