Home / 20,580.58-28,401.21-11,149.14

Finding the Fourth Proportional to 20,580.58, 28,401.21 and 11,149.14

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Solution

The fourth proportional to 20,580.58, 28,401.21 and 11,149.14 is: 15,385.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.58 : 28,401.21 = 11,149.14 : x
  2. Step 2: Convert to fraction form
    20,580.58/28,401.21 = 11,149.14/x
  3. Step 3: Cross multiply
    20,580.58x = 28,401.21 × 11,149.14
  4. Step 4: Simplify right side
    20,580.58x = 316,649,066.46
  5. Step 5: Solve for x
    x = 316,649,066.46/20,580.58
  6. Step 6: Final answer
    x = 15,385.82

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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.