Home / 2,638.64-3,639.90-1,575.92

Finding the Fourth Proportional to 2,638.64, 3,639.90 and 1,575.92

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Solution

The fourth proportional to 2,638.64, 3,639.90 and 1,575.92 is: 2,173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.64 : 3,639.90 = 1,575.92 : x
  2. Step 2: Convert to fraction form
    2,638.64/3,639.90 = 1,575.92/x
  3. Step 3: Cross multiply
    2,638.64x = 3,639.90 × 1,575.92
  4. Step 4: Simplify right side
    2,638.64x = 5,736,191.21
  5. Step 5: Solve for x
    x = 5,736,191.21/2,638.64
  6. Step 6: Final answer
    x = 2,173.92

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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.