Home / 20,565.08-28,379.82-11,133.64

Finding the Fourth Proportional to 20,565.08, 28,379.82 and 11,133.64

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Solution

The fourth proportional to 20,565.08, 28,379.82 and 11,133.64 is: 15,364.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.08 : 28,379.82 = 11,133.64 : x
  2. Step 2: Convert to fraction form
    20,565.08/28,379.82 = 11,133.64/x
  3. Step 3: Cross multiply
    20,565.08x = 28,379.82 × 11,133.64
  4. Step 4: Simplify right side
    20,565.08x = 315,970,699.14
  5. Step 5: Solve for x
    x = 315,970,699.14/20,565.08
  6. Step 6: Final answer
    x = 15,364.43

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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.