Home / 13,619.88-20,429.27-3,758.91

Finding the Fourth Proportional to 13,619.88, 20,429.27 and 3,758.91

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Solution

The fourth proportional to 13,619.88, 20,429.27 and 3,758.91 is: 5,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.88 : 20,429.27 = 3,758.91 : x
  2. Step 2: Convert to fraction form
    13,619.88/20,429.27 = 3,758.91/x
  3. Step 3: Cross multiply
    13,619.88x = 20,429.27 × 3,758.91
  4. Step 4: Simplify right side
    13,619.88x = 76,791,666.35
  5. Step 5: Solve for x
    x = 76,791,666.35/13,619.88
  6. Step 6: Final answer
    x = 5,638.20

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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.