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Finding the Fourth Proportional to 15,028.94, 20,739.70 and 8,314.45

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Solution

The fourth proportional to 15,028.94, 20,739.70 and 8,314.45 is: 11,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,028.94 : 20,739.70 = 8,314.45 : x
  2. Step 2: Convert to fraction form
    15,028.94/20,739.70 = 8,314.45/x
  3. Step 3: Cross multiply
    15,028.94x = 20,739.70 × 8,314.45
  4. Step 4: Simplify right side
    15,028.94x = 172,439,110.44
  5. Step 5: Solve for x
    x = 172,439,110.44/15,028.94
  6. Step 6: Final answer
    x = 11,473.80

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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.