Home / 20,662.76-28,519.80-11,715.60

Finding the Fourth Proportional to 20,662.76, 28,519.80 and 11,715.60

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Solution

The fourth proportional to 20,662.76, 28,519.80 and 11,715.60 is: 16,170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.76 : 28,519.80 = 11,715.60 : x
  2. Step 2: Convert to fraction form
    20,662.76/28,519.80 = 11,715.60/x
  3. Step 3: Cross multiply
    20,662.76x = 28,519.80 × 11,715.60
  4. Step 4: Simplify right side
    20,662.76x = 334,126,631.90
  5. Step 5: Solve for x
    x = 334,126,631.90/20,662.76
  6. Step 6: Final answer
    x = 16,170.47

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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.