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Finding the Fourth Proportional to 15,028.14, 20,739.62 and 8,655.70

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Solution

The fourth proportional to 15,028.14, 20,739.62 and 8,655.70 is: 11,945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,028.14 : 20,739.62 = 8,655.70 : x
  2. Step 2: Convert to fraction form
    15,028.14/20,739.62 = 8,655.70/x
  3. Step 3: Cross multiply
    15,028.14x = 20,739.62 × 8,655.70
  4. Step 4: Simplify right side
    15,028.14x = 179,515,928.83
  5. Step 5: Solve for x
    x = 179,515,928.83/15,028.14
  6. Step 6: Final answer
    x = 11,945.32

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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.