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Finding the Fourth Proportional to 21,487.83, 32,231.22 and 12,659.14

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Solution

The fourth proportional to 21,487.83, 32,231.22 and 12,659.14 is: 18,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.83 : 32,231.22 = 12,659.14 : x
  2. Step 2: Convert to fraction form
    21,487.83/32,231.22 = 12,659.14/x
  3. Step 3: Cross multiply
    21,487.83x = 32,231.22 × 12,659.14
  4. Step 4: Simplify right side
    21,487.83x = 408,019,526.35
  5. Step 5: Solve for x
    x = 408,019,526.35/21,487.83
  6. Step 6: Final answer
    x = 18,988.40

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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.