Home / 20,605.16-28,435.09-11,173.72

Finding the Fourth Proportional to 20,605.16, 28,435.09 and 11,173.72

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Solution

The fourth proportional to 20,605.16, 28,435.09 and 11,173.72 is: 15,419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.16 : 28,435.09 = 11,173.72 : x
  2. Step 2: Convert to fraction form
    20,605.16/28,435.09 = 11,173.72/x
  3. Step 3: Cross multiply
    20,605.16x = 28,435.09 × 11,173.72
  4. Step 4: Simplify right side
    20,605.16x = 317,725,535.79
  5. Step 5: Solve for x
    x = 317,725,535.79/20,605.16
  6. Step 6: Final answer
    x = 15,419.71

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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.