Home / 20,779.80-28,677.58-11,827.30

Finding the Fourth Proportional to 20,779.80, 28,677.58 and 11,827.30

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Solution

The fourth proportional to 20,779.80, 28,677.58 and 11,827.30 is: 16,322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.80 : 28,677.58 = 11,827.30 : x
  2. Step 2: Convert to fraction form
    20,779.80/28,677.58 = 11,827.30/x
  3. Step 3: Cross multiply
    20,779.80x = 28,677.58 × 11,827.30
  4. Step 4: Simplify right side
    20,779.80x = 339,178,435.97
  5. Step 5: Solve for x
    x = 339,178,435.97/20,779.80
  6. Step 6: Final answer
    x = 16,322.51

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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.