Home / 21,708.80-32,538.90-12,353.30

Finding the Fourth Proportional to 21,708.80, 32,538.90 and 12,353.30

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Solution

The fourth proportional to 21,708.80, 32,538.90 and 12,353.30 is: 18,516.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.80 : 32,538.90 = 12,353.30 : x
  2. Step 2: Convert to fraction form
    21,708.80/32,538.90 = 12,353.30/x
  3. Step 3: Cross multiply
    21,708.80x = 32,538.90 × 12,353.30
  4. Step 4: Simplify right side
    21,708.80x = 401,962,793.37
  5. Step 5: Solve for x
    x = 401,962,793.37/21,708.80
  6. Step 6: Final answer
    x = 18,516.12

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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.