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Finding the Fourth Proportional to 21,958.96, 30,303.12 and 11,887.16

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Solution

The fourth proportional to 21,958.96, 30,303.12 and 11,887.16 is: 16,404.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.96 : 30,303.12 = 11,887.16 : x
  2. Step 2: Convert to fraction form
    21,958.96/30,303.12 = 11,887.16/x
  3. Step 3: Cross multiply
    21,958.96x = 30,303.12 × 11,887.16
  4. Step 4: Simplify right side
    21,958.96x = 360,218,035.94
  5. Step 5: Solve for x
    x = 360,218,035.94/21,958.96
  6. Step 6: Final answer
    x = 16,404.15

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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.