Home / 20,276.64-27,986.40-13,190.88

Finding the Fourth Proportional to 20,276.64, 27,986.40 and 13,190.88

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Solution

The fourth proportional to 20,276.64, 27,986.40 and 13,190.88 is: 18,206.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.64 : 27,986.40 = 13,190.88 : x
  2. Step 2: Convert to fraction form
    20,276.64/27,986.40 = 13,190.88/x
  3. Step 3: Cross multiply
    20,276.64x = 27,986.40 × 13,190.88
  4. Step 4: Simplify right side
    20,276.64x = 369,165,244.03
  5. Step 5: Solve for x
    x = 369,165,244.03/20,276.64
  6. Step 6: Final answer
    x = 18,206.43

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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.