Home / 13,639.85-20,459.70-3,508.21

Finding the Fourth Proportional to 13,639.85, 20,459.70 and 3,508.21

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Solution

The fourth proportional to 13,639.85, 20,459.70 and 3,508.21 is: 5,262.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.85 : 20,459.70 = 3,508.21 : x
  2. Step 2: Convert to fraction form
    13,639.85/20,459.70 = 3,508.21/x
  3. Step 3: Cross multiply
    13,639.85x = 20,459.70 × 3,508.21
  4. Step 4: Simplify right side
    13,639.85x = 71,776,924.14
  5. Step 5: Solve for x
    x = 71,776,924.14/13,639.85
  6. Step 6: Final answer
    x = 5,262.30

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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.