Home / 20,353.40-28,086.86-11,400.76

Finding the Fourth Proportional to 20,353.40, 28,086.86 and 11,400.76

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Solution

The fourth proportional to 20,353.40, 28,086.86 and 11,400.76 is: 15,732.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.40 : 28,086.86 = 11,400.76 : x
  2. Step 2: Convert to fraction form
    20,353.40/28,086.86 = 11,400.76/x
  3. Step 3: Cross multiply
    20,353.40x = 28,086.86 × 11,400.76
  4. Step 4: Simplify right side
    20,353.40x = 320,211,550.01
  5. Step 5: Solve for x
    x = 320,211,550.01/20,353.40
  6. Step 6: Final answer
    x = 15,732.58

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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.