Home / 3,613.16-5,418.38-1,420.69

Finding the Fourth Proportional to 3,613.16, 5,418.38 and 1,420.69

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Solution

The fourth proportional to 3,613.16, 5,418.38 and 1,420.69 is: 2,130.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.16 : 5,418.38 = 1,420.69 : x
  2. Step 2: Convert to fraction form
    3,613.16/5,418.38 = 1,420.69/x
  3. Step 3: Cross multiply
    3,613.16x = 5,418.38 × 1,420.69
  4. Step 4: Simplify right side
    3,613.16x = 7,697,838.28
  5. Step 5: Solve for x
    x = 7,697,838.28/3,613.16
  6. Step 6: Final answer
    x = 2,130.50

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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.