Home / 13,729.60-20,601.29-5,415.58

Finding the Fourth Proportional to 13,729.60, 20,601.29 and 5,415.58

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Solution

The fourth proportional to 13,729.60, 20,601.29 and 5,415.58 is: 8,126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.60 : 20,601.29 = 5,415.58 : x
  2. Step 2: Convert to fraction form
    13,729.60/20,601.29 = 5,415.58/x
  3. Step 3: Cross multiply
    13,729.60x = 20,601.29 × 5,415.58
  4. Step 4: Simplify right side
    13,729.60x = 111,567,934.10
  5. Step 5: Solve for x
    x = 111,567,934.10/13,729.60
  6. Step 6: Final answer
    x = 8,126.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.