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Finding the Fourth Proportional to 13,585.67, 18,751.34 and 7,999.91

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Solution

The fourth proportional to 13,585.67, 18,751.34 and 7,999.91 is: 11,041.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,585.67 : 18,751.34 = 7,999.91 : x
  2. Step 2: Convert to fraction form
    13,585.67/18,751.34 = 7,999.91/x
  3. Step 3: Cross multiply
    13,585.67x = 18,751.34 × 7,999.91
  4. Step 4: Simplify right side
    13,585.67x = 150,008,992.38
  5. Step 5: Solve for x
    x = 150,008,992.38/13,585.67
  6. Step 6: Final answer
    x = 11,041.71

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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.