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Finding the Fourth Proportional to 15,036.73, 20,751.02 and 8,231.40

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Solution

The fourth proportional to 15,036.73, 20,751.02 and 8,231.40 is: 11,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,036.73 : 20,751.02 = 8,231.40 : x
  2. Step 2: Convert to fraction form
    15,036.73/20,751.02 = 8,231.40/x
  3. Step 3: Cross multiply
    15,036.73x = 20,751.02 × 8,231.40
  4. Step 4: Simplify right side
    15,036.73x = 170,809,912.10
  5. Step 5: Solve for x
    x = 170,809,912.10/15,036.73
  6. Step 6: Final answer
    x = 11,359.51

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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.