Home / 20,818.14-28,729.80-11,867.10

Finding the Fourth Proportional to 20,818.14, 28,729.80 and 11,867.10

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Solution

The fourth proportional to 20,818.14, 28,729.80 and 11,867.10 is: 16,377.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.14 : 28,729.80 = 11,867.10 : x
  2. Step 2: Convert to fraction form
    20,818.14/28,729.80 = 11,867.10/x
  3. Step 3: Cross multiply
    20,818.14x = 28,729.80 × 11,867.10
  4. Step 4: Simplify right side
    20,818.14x = 340,939,409.58
  5. Step 5: Solve for x
    x = 340,939,409.58/20,818.14
  6. Step 6: Final answer
    x = 16,377.04

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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.