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Finding the Fourth Proportional to 3,525.64, 4,865.36 and 2,128.64

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Solution

The fourth proportional to 3,525.64, 4,865.36 and 2,128.64 is: 2,937.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,525.64 : 4,865.36 = 2,128.64 : x
  2. Step 2: Convert to fraction form
    3,525.64/4,865.36 = 2,128.64/x
  3. Step 3: Cross multiply
    3,525.64x = 4,865.36 × 2,128.64
  4. Step 4: Simplify right side
    3,525.64x = 10,356,599.91
  5. Step 5: Solve for x
    x = 10,356,599.91/3,525.64
  6. Step 6: Final answer
    x = 2,937.51

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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.