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Finding the Fourth Proportional to 18,485.71, 27,731.60 and 10,169.64

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Solution

The fourth proportional to 18,485.71, 27,731.60 and 10,169.64 is: 15,256.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,485.71 : 27,731.60 = 10,169.64 : x
  2. Step 2: Convert to fraction form
    18,485.71/27,731.60 = 10,169.64/x
  3. Step 3: Cross multiply
    18,485.71x = 27,731.60 × 10,169.64
  4. Step 4: Simplify right side
    18,485.71x = 282,020,388.62
  5. Step 5: Solve for x
    x = 282,020,388.62/18,485.71
  6. Step 6: Final answer
    x = 15,256.13

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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.