Home / 20,887.23-28,817.55-11,811.18

Finding the Fourth Proportional to 20,887.23, 28,817.55 and 11,811.18

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Solution

The fourth proportional to 20,887.23, 28,817.55 and 11,811.18 is: 16,295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.23 : 28,817.55 = 11,811.18 : x
  2. Step 2: Convert to fraction form
    20,887.23/28,817.55 = 11,811.18/x
  3. Step 3: Cross multiply
    20,887.23x = 28,817.55 × 11,811.18
  4. Step 4: Simplify right side
    20,887.23x = 340,369,270.21
  5. Step 5: Solve for x
    x = 340,369,270.21/20,887.23
  6. Step 6: Final answer
    x = 16,295.57

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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.