Home / 20,761.86-28,682.58-13,608.75

Finding the Fourth Proportional to 20,761.86, 28,682.58 and 13,608.75

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Solution

The fourth proportional to 20,761.86, 28,682.58 and 13,608.75 is: 18,800.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.86 : 28,682.58 = 13,608.75 : x
  2. Step 2: Convert to fraction form
    20,761.86/28,682.58 = 13,608.75/x
  3. Step 3: Cross multiply
    20,761.86x = 28,682.58 × 13,608.75
  4. Step 4: Simplify right side
    20,761.86x = 390,334,060.58
  5. Step 5: Solve for x
    x = 390,334,060.58/20,761.86
  6. Step 6: Final answer
    x = 18,800.53

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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.