Home / 13,639.79-20,459.60-3,508.15

Finding the Fourth Proportional to 13,639.79, 20,459.60 and 3,508.15

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Solution

The fourth proportional to 13,639.79, 20,459.60 and 3,508.15 is: 5,262.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.79 : 20,459.60 = 3,508.15 : x
  2. Step 2: Convert to fraction form
    13,639.79/20,459.60 = 3,508.15/x
  3. Step 3: Cross multiply
    13,639.79x = 20,459.60 × 3,508.15
  4. Step 4: Simplify right side
    13,639.79x = 71,775,380.08
  5. Step 5: Solve for x
    x = 71,775,380.08/13,639.79
  6. Step 6: Final answer
    x = 5,262.21

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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.