Home / 20,403.46-28,159.60-11,451.50

Finding the Fourth Proportional to 20,403.46, 28,159.60 and 11,451.50

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Solution

The fourth proportional to 20,403.46, 28,159.60 and 11,451.50 is: 15,804.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.46 : 28,159.60 = 11,451.50 : x
  2. Step 2: Convert to fraction form
    20,403.46/28,159.60 = 11,451.50/x
  3. Step 3: Cross multiply
    20,403.46x = 28,159.60 × 11,451.50
  4. Step 4: Simplify right side
    20,403.46x = 322,469,659.40
  5. Step 5: Solve for x
    x = 322,469,659.40/20,403.46
  6. Step 6: Final answer
    x = 15,804.66

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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.