Home / 20,406.98-28,161.60-11,454.49

Finding the Fourth Proportional to 20,406.98, 28,161.60 and 11,454.49

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Solution

The fourth proportional to 20,406.98, 28,161.60 and 11,454.49 is: 15,807.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.98 : 28,161.60 = 11,454.49 : x
  2. Step 2: Convert to fraction form
    20,406.98/28,161.60 = 11,454.49/x
  3. Step 3: Cross multiply
    20,406.98x = 28,161.60 × 11,454.49
  4. Step 4: Simplify right side
    20,406.98x = 322,576,765.58
  5. Step 5: Solve for x
    x = 322,576,765.58/20,406.98
  6. Step 6: Final answer
    x = 15,807.18

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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.