Home / 3,639.60-5,459.40-2,079.60

Finding the Fourth Proportional to 3,639.60, 5,459.40 and 2,079.60

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Solution

The fourth proportional to 3,639.60, 5,459.40 and 2,079.60 is: 3,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.60 : 5,459.40 = 2,079.60 : x
  2. Step 2: Convert to fraction form
    3,639.60/5,459.40 = 2,079.60/x
  3. Step 3: Cross multiply
    3,639.60x = 5,459.40 × 2,079.60
  4. Step 4: Simplify right side
    3,639.60x = 11,353,368.24
  5. Step 5: Solve for x
    x = 11,353,368.24/3,639.60
  6. Step 6: Final answer
    x = 3,119.40

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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.