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Finding the Fourth Proportional to 12,390.37, 17,093.13 and 7,354.80

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Solution

The fourth proportional to 12,390.37, 17,093.13 and 7,354.80 is: 10,146.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.37 : 17,093.13 = 7,354.80 : x
  2. Step 2: Convert to fraction form
    12,390.37/17,093.13 = 7,354.80/x
  3. Step 3: Cross multiply
    12,390.37x = 17,093.13 × 7,354.80
  4. Step 4: Simplify right side
    12,390.37x = 125,716,524.94
  5. Step 5: Solve for x
    x = 125,716,524.94/12,390.37
  6. Step 6: Final answer
    x = 10,146.31

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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.