Home / 20,580.51-28,401.21-11,149.08

Finding the Fourth Proportional to 20,580.51, 28,401.21 and 11,149.08

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Solution

The fourth proportional to 20,580.51, 28,401.21 and 11,149.08 is: 15,385.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.51 : 28,401.21 = 11,149.08 : x
  2. Step 2: Convert to fraction form
    20,580.51/28,401.21 = 11,149.08/x
  3. Step 3: Cross multiply
    20,580.51x = 28,401.21 × 11,149.08
  4. Step 4: Simplify right side
    20,580.51x = 316,647,362.39
  5. Step 5: Solve for x
    x = 316,647,362.39/20,580.51
  6. Step 6: Final answer
    x = 15,385.79

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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.