Home / 20,315.37-28,035.54-11,361.90

Finding the Fourth Proportional to 20,315.37, 28,035.54 and 11,361.90

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Solution

The fourth proportional to 20,315.37, 28,035.54 and 11,361.90 is: 15,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.37 : 28,035.54 = 11,361.90 : x
  2. Step 2: Convert to fraction form
    20,315.37/28,035.54 = 11,361.90/x
  3. Step 3: Cross multiply
    20,315.37x = 28,035.54 × 11,361.90
  4. Step 4: Simplify right side
    20,315.37x = 318,537,001.93
  5. Step 5: Solve for x
    x = 318,537,001.93/20,315.37
  6. Step 6: Final answer
    x = 15,679.61

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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.