Home / 20,860.08-28,779.72-11,901.12

Finding the Fourth Proportional to 20,860.08, 28,779.72 and 11,901.12

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Solution

The fourth proportional to 20,860.08, 28,779.72 and 11,901.12 is: 16,419.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.08 : 28,779.72 = 11,901.12 : x
  2. Step 2: Convert to fraction form
    20,860.08/28,779.72 = 11,901.12/x
  3. Step 3: Cross multiply
    20,860.08x = 28,779.72 × 11,901.12
  4. Step 4: Simplify right side
    20,860.08x = 342,510,901.29
  5. Step 5: Solve for x
    x = 342,510,901.29/20,860.08
  6. Step 6: Final answer
    x = 16,419.44

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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.