Home / 20,575.86-28,394.64-11,144.40

Finding the Fourth Proportional to 20,575.86, 28,394.64 and 11,144.40

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Solution

The fourth proportional to 20,575.86, 28,394.64 and 11,144.40 is: 15,379.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.86 : 28,394.64 = 11,144.40 : x
  2. Step 2: Convert to fraction form
    20,575.86/28,394.64 = 11,144.40/x
  3. Step 3: Cross multiply
    20,575.86x = 28,394.64 × 11,144.40
  4. Step 4: Simplify right side
    20,575.86x = 316,441,226.02
  5. Step 5: Solve for x
    x = 316,441,226.02/20,575.86
  6. Step 6: Final answer
    x = 15,379.25

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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.