Home / 4,671.28-6,438.90-3,178.72

Finding the Fourth Proportional to 4,671.28, 6,438.90 and 3,178.72

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Solution

The fourth proportional to 4,671.28, 6,438.90 and 3,178.72 is: 4,381.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,671.28 : 6,438.90 = 3,178.72 : x
  2. Step 2: Convert to fraction form
    4,671.28/6,438.90 = 3,178.72/x
  3. Step 3: Cross multiply
    4,671.28x = 6,438.90 × 3,178.72
  4. Step 4: Simplify right side
    4,671.28x = 20,467,460.21
  5. Step 5: Solve for x
    x = 20,467,460.21/4,671.28
  6. Step 6: Final answer
    x = 4,381.55

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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.