Home / 3,421.64-4,718.05-2,161.28

Finding the Fourth Proportional to 3,421.64, 4,718.05 and 2,161.28

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Solution

The fourth proportional to 3,421.64, 4,718.05 and 2,161.28 is: 2,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.64 : 4,718.05 = 2,161.28 : x
  2. Step 2: Convert to fraction form
    3,421.64/4,718.05 = 2,161.28/x
  3. Step 3: Cross multiply
    3,421.64x = 4,718.05 × 2,161.28
  4. Step 4: Simplify right side
    3,421.64x = 10,197,033.50
  5. Step 5: Solve for x
    x = 10,197,033.50/3,421.64
  6. Step 6: Final answer
    x = 2,980.16

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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.