Home / 20,628.58-28,474.20-12,130.30

Finding the Fourth Proportional to 20,628.58, 28,474.20 and 12,130.30

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Solution

The fourth proportional to 20,628.58, 28,474.20 and 12,130.30 is: 16,743.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.58 : 28,474.20 = 12,130.30 : x
  2. Step 2: Convert to fraction form
    20,628.58/28,474.20 = 12,130.30/x
  3. Step 3: Cross multiply
    20,628.58x = 28,474.20 × 12,130.30
  4. Step 4: Simplify right side
    20,628.58x = 345,400,588.26
  5. Step 5: Solve for x
    x = 345,400,588.26/20,628.58
  6. Step 6: Final answer
    x = 16,743.79

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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.