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Finding the Fourth Proportional to 20,888.91, 28,826.31 and 11,814.12

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Solution

The fourth proportional to 20,888.91, 28,826.31 and 11,814.12 is: 16,303.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.91 : 28,826.31 = 11,814.12 : x
  2. Step 2: Convert to fraction form
    20,888.91/28,826.31 = 11,814.12/x
  3. Step 3: Cross multiply
    20,888.91x = 28,826.31 × 11,814.12
  4. Step 4: Simplify right side
    20,888.91x = 340,557,485.50
  5. Step 5: Solve for x
    x = 340,557,485.50/20,888.91
  6. Step 6: Final answer
    x = 16,303.27

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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.