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Finding the Fourth Proportional to 21,659.72, 32,489.82 and 7,808.84

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Solution

The fourth proportional to 21,659.72, 32,489.82 and 7,808.84 is: 11,713.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.72 : 32,489.82 = 7,808.84 : x
  2. Step 2: Convert to fraction form
    21,659.72/32,489.82 = 7,808.84/x
  3. Step 3: Cross multiply
    21,659.72x = 32,489.82 × 7,808.84
  4. Step 4: Simplify right side
    21,659.72x = 253,707,806.01
  5. Step 5: Solve for x
    x = 253,707,806.01/21,659.72
  6. Step 6: Final answer
    x = 11,713.35

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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.