Home / 3,639.65-5,453.40-3,117.20

Finding the Fourth Proportional to 3,639.65, 5,453.40 and 3,117.20

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Solution

The fourth proportional to 3,639.65, 5,453.40 and 3,117.20 is: 4,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.65 : 5,453.40 = 3,117.20 : x
  2. Step 2: Convert to fraction form
    3,639.65/5,453.40 = 3,117.20/x
  3. Step 3: Cross multiply
    3,639.65x = 5,453.40 × 3,117.20
  4. Step 4: Simplify right side
    3,639.65x = 16,999,338.48
  5. Step 5: Solve for x
    x = 16,999,338.48/3,639.65
  6. Step 6: Final answer
    x = 4,670.60

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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.