Home / 20,811.18-28,717.95-11,857.04

Finding the Fourth Proportional to 20,811.18, 28,717.95 and 11,857.04

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Solution

The fourth proportional to 20,811.18, 28,717.95 and 11,857.04 is: 16,361.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.18 : 28,717.95 = 11,857.04 : x
  2. Step 2: Convert to fraction form
    20,811.18/28,717.95 = 11,857.04/x
  3. Step 3: Cross multiply
    20,811.18x = 28,717.95 × 11,857.04
  4. Step 4: Simplify right side
    20,811.18x = 340,509,881.87
  5. Step 5: Solve for x
    x = 340,509,881.87/20,811.18
  6. Step 6: Final answer
    x = 16,361.87

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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.