Home / 20,580.75-28,401.74-11,149.31

Finding the Fourth Proportional to 20,580.75, 28,401.74 and 11,149.31

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Solution

The fourth proportional to 20,580.75, 28,401.74 and 11,149.31 is: 15,386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.75 : 28,401.74 = 11,149.31 : x
  2. Step 2: Convert to fraction form
    20,580.75/28,401.74 = 11,149.31/x
  3. Step 3: Cross multiply
    20,580.75x = 28,401.74 × 11,149.31
  4. Step 4: Simplify right side
    20,580.75x = 316,659,860.87
  5. Step 5: Solve for x
    x = 316,659,860.87/20,580.75
  6. Step 6: Final answer
    x = 15,386.22

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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.