Home / 3,613.60-4,986.48-2,121.40

Finding the Fourth Proportional to 3,613.60, 4,986.48 and 2,121.40

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Solution

The fourth proportional to 3,613.60, 4,986.48 and 2,121.40 is: 2,927.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.60 : 4,986.48 = 2,121.40 : x
  2. Step 2: Convert to fraction form
    3,613.60/4,986.48 = 2,121.40/x
  3. Step 3: Cross multiply
    3,613.60x = 4,986.48 × 2,121.40
  4. Step 4: Simplify right side
    3,613.60x = 10,578,318.67
  5. Step 5: Solve for x
    x = 10,578,318.67/3,613.60
  6. Step 6: Final answer
    x = 2,927.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.