Home / 20,818.84-28,729.27-11,869.22

Finding the Fourth Proportional to 20,818.84, 28,729.27 and 11,869.22

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Solution

The fourth proportional to 20,818.84, 28,729.27 and 11,869.22 is: 16,379.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.84 : 28,729.27 = 11,869.22 : x
  2. Step 2: Convert to fraction form
    20,818.84/28,729.27 = 11,869.22/x
  3. Step 3: Cross multiply
    20,818.84x = 28,729.27 × 11,869.22
  4. Step 4: Simplify right side
    20,818.84x = 340,993,966.72
  5. Step 5: Solve for x
    x = 340,993,966.72/20,818.84
  6. Step 6: Final answer
    x = 16,379.11

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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.