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Finding the Fourth Proportional to 18,709.63, 28,062.17 and 11,690.27

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Solution

The fourth proportional to 18,709.63, 28,062.17 and 11,690.27 is: 17,533.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.63 : 28,062.17 = 11,690.27 : x
  2. Step 2: Convert to fraction form
    18,709.63/28,062.17 = 11,690.27/x
  3. Step 3: Cross multiply
    18,709.63x = 28,062.17 × 11,690.27
  4. Step 4: Simplify right side
    18,709.63x = 328,054,485.12
  5. Step 5: Solve for x
    x = 328,054,485.12/18,709.63
  6. Step 6: Final answer
    x = 17,533.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.