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Finding the Fourth Proportional to 20,615, 28,448.70 and 11,662.32

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Solution

The fourth proportional to 20,615, 28,448.70 and 11,662.32 is: 16,094.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615 : 28,448.70 = 11,662.32 : x
  2. Step 2: Convert to fraction form
    20,615/28,448.70 = 11,662.32/x
  3. Step 3: Cross multiply
    20,615x = 28,448.70 × 11,662.32
  4. Step 4: Simplify right side
    20,615x = 331,777,842.98
  5. Step 5: Solve for x
    x = 331,777,842.98/20,615
  6. Step 6: Final answer
    x = 16,094.00

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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.