Home / 21,020.21-31,487.23-16,837.57

Finding the Fourth Proportional to 21,020.21, 31,487.23 and 16,837.57

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Solution

The fourth proportional to 21,020.21, 31,487.23 and 16,837.57 is: 25,221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.21 : 31,487.23 = 16,837.57 : x
  2. Step 2: Convert to fraction form
    21,020.21/31,487.23 = 16,837.57/x
  3. Step 3: Cross multiply
    21,020.21x = 31,487.23 × 16,837.57
  4. Step 4: Simplify right side
    21,020.21x = 530,168,499.64
  5. Step 5: Solve for x
    x = 530,168,499.64/21,020.21
  6. Step 6: Final answer
    x = 25,221.85

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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.