Home / 3,455.10-4,767.96-2,128.76

Finding the Fourth Proportional to 3,455.10, 4,767.96 and 2,128.76

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Solution

The fourth proportional to 3,455.10, 4,767.96 and 2,128.76 is: 2,937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.10 : 4,767.96 = 2,128.76 : x
  2. Step 2: Convert to fraction form
    3,455.10/4,767.96 = 2,128.76/x
  3. Step 3: Cross multiply
    3,455.10x = 4,767.96 × 2,128.76
  4. Step 4: Simplify right side
    3,455.10x = 10,149,842.53
  5. Step 5: Solve for x
    x = 10,149,842.53/3,455.10
  6. Step 6: Final answer
    x = 2,937.64

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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.