Home / 20,415.90-28,173.84-11,463.54

Finding the Fourth Proportional to 20,415.90, 28,173.84 and 11,463.54

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Solution

The fourth proportional to 20,415.90, 28,173.84 and 11,463.54 is: 15,819.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.90 : 28,173.84 = 11,463.54 : x
  2. Step 2: Convert to fraction form
    20,415.90/28,173.84 = 11,463.54/x
  3. Step 3: Cross multiply
    20,415.90x = 28,173.84 × 11,463.54
  4. Step 4: Simplify right side
    20,415.90x = 322,971,941.79
  5. Step 5: Solve for x
    x = 322,971,941.79/20,415.90
  6. Step 6: Final answer
    x = 15,819.63

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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.