Home / 20,436.21-28,201.06-11,939.12

Finding the Fourth Proportional to 20,436.21, 28,201.06 and 11,939.12

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Solution

The fourth proportional to 20,436.21, 28,201.06 and 11,939.12 is: 16,475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.21 : 28,201.06 = 11,939.12 : x
  2. Step 2: Convert to fraction form
    20,436.21/28,201.06 = 11,939.12/x
  3. Step 3: Cross multiply
    20,436.21x = 28,201.06 × 11,939.12
  4. Step 4: Simplify right side
    20,436.21x = 336,695,638.77
  5. Step 5: Solve for x
    x = 336,695,638.77/20,436.21
  6. Step 6: Final answer
    x = 16,475.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.