Home / 20,672.81-28,530.59-12,177.60

Finding the Fourth Proportional to 20,672.81, 28,530.59 and 12,177.60

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Solution

The fourth proportional to 20,672.81, 28,530.59 and 12,177.60 is: 16,806.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.81 : 28,530.59 = 12,177.60 : x
  2. Step 2: Convert to fraction form
    20,672.81/28,530.59 = 12,177.60/x
  3. Step 3: Cross multiply
    20,672.81x = 28,530.59 × 12,177.60
  4. Step 4: Simplify right side
    20,672.81x = 347,434,250.22
  5. Step 5: Solve for x
    x = 347,434,250.22/20,672.81
  6. Step 6: Final answer
    x = 16,806.34

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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.