Home / 3,613.92-5,423.64-1,421.40

Finding the Fourth Proportional to 3,613.92, 5,423.64 and 1,421.40

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Solution

The fourth proportional to 3,613.92, 5,423.64 and 1,421.40 is: 2,133.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.92 : 5,423.64 = 1,421.40 : x
  2. Step 2: Convert to fraction form
    3,613.92/5,423.64 = 1,421.40/x
  3. Step 3: Cross multiply
    3,613.92x = 5,423.64 × 1,421.40
  4. Step 4: Simplify right side
    3,613.92x = 7,709,161.90
  5. Step 5: Solve for x
    x = 7,709,161.90/3,613.92
  6. Step 6: Final answer
    x = 2,133.19

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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.