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Finding the Fourth Proportional to 21,808.08, 32,716.44 and 7,958.16

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Solution

The fourth proportional to 21,808.08, 32,716.44 and 7,958.16 is: 11,938.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.08 : 32,716.44 = 7,958.16 : x
  2. Step 2: Convert to fraction form
    21,808.08/32,716.44 = 7,958.16/x
  3. Step 3: Cross multiply
    21,808.08x = 32,716.44 × 7,958.16
  4. Step 4: Simplify right side
    21,808.08x = 260,362,664.15
  5. Step 5: Solve for x
    x = 260,362,664.15/21,808.08
  6. Step 6: Final answer
    x = 11,938.82

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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.