Home / 20,884.10-28,818.18-11,931.57

Finding the Fourth Proportional to 20,884.10, 28,818.18 and 11,931.57

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Solution

The fourth proportional to 20,884.10, 28,818.18 and 11,931.57 is: 16,464.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.10 : 28,818.18 = 11,931.57 : x
  2. Step 2: Convert to fraction form
    20,884.10/28,818.18 = 11,931.57/x
  3. Step 3: Cross multiply
    20,884.10x = 28,818.18 × 11,931.57
  4. Step 4: Simplify right side
    20,884.10x = 343,846,131.94
  5. Step 5: Solve for x
    x = 343,846,131.94/20,884.10
  6. Step 6: Final answer
    x = 16,464.50

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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.