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Finding the Fourth Proportional to 13,999.96, 20,897.49 and 12,339.24

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Solution

The fourth proportional to 13,999.96, 20,897.49 and 12,339.24 is: 18,418.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.96 : 20,897.49 = 12,339.24 : x
  2. Step 2: Convert to fraction form
    13,999.96/20,897.49 = 12,339.24/x
  3. Step 3: Cross multiply
    13,999.96x = 20,897.49 × 12,339.24
  4. Step 4: Simplify right side
    13,999.96x = 257,859,144.51
  5. Step 5: Solve for x
    x = 257,859,144.51/13,999.96
  6. Step 6: Final answer
    x = 18,418.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.