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Finding the Fourth Proportional to 15,161.93, 20,923.01 and 8,447.14

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Solution

The fourth proportional to 15,161.93, 20,923.01 and 8,447.14 is: 11,656.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.93 : 20,923.01 = 8,447.14 : x
  2. Step 2: Convert to fraction form
    15,161.93/20,923.01 = 8,447.14/x
  3. Step 3: Cross multiply
    15,161.93x = 20,923.01 × 8,447.14
  4. Step 4: Simplify right side
    15,161.93x = 176,739,500.15
  5. Step 5: Solve for x
    x = 176,739,500.15/15,161.93
  6. Step 6: Final answer
    x = 11,656.80

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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.