Home / 20,759.86-28,679.82-13,606.75

Finding the Fourth Proportional to 20,759.86, 28,679.82 and 13,606.75

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Solution

The fourth proportional to 20,759.86, 28,679.82 and 13,606.75 is: 18,797.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.86 : 28,679.82 = 13,606.75 : x
  2. Step 2: Convert to fraction form
    20,759.86/28,679.82 = 13,606.75/x
  3. Step 3: Cross multiply
    20,759.86x = 28,679.82 × 13,606.75
  4. Step 4: Simplify right side
    20,759.86x = 390,239,140.79
  5. Step 5: Solve for x
    x = 390,239,140.79/20,759.86
  6. Step 6: Final answer
    x = 18,797.77

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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.