Home / 20,584.49-28,406.64-11,153.05

Finding the Fourth Proportional to 20,584.49, 28,406.64 and 11,153.05

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Solution

The fourth proportional to 20,584.49, 28,406.64 and 11,153.05 is: 15,391.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.49 : 28,406.64 = 11,153.05 : x
  2. Step 2: Convert to fraction form
    20,584.49/28,406.64 = 11,153.05/x
  3. Step 3: Cross multiply
    20,584.49x = 28,406.64 × 11,153.05
  4. Step 4: Simplify right side
    20,584.49x = 316,820,676.25
  5. Step 5: Solve for x
    x = 316,820,676.25/20,584.49
  6. Step 6: Final answer
    x = 15,391.23

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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.