Home / 20,605.28-28,435.26-11,173.82

Finding the Fourth Proportional to 20,605.28, 28,435.26 and 11,173.82

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Solution

The fourth proportional to 20,605.28, 28,435.26 and 11,173.82 is: 15,419.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.28 : 28,435.26 = 11,173.82 : x
  2. Step 2: Convert to fraction form
    20,605.28/28,435.26 = 11,173.82/x
  3. Step 3: Cross multiply
    20,605.28x = 28,435.26 × 11,173.82
  4. Step 4: Simplify right side
    20,605.28x = 317,730,476.89
  5. Step 5: Solve for x
    x = 317,730,476.89/20,605.28
  6. Step 6: Final answer
    x = 15,419.86

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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.