Home / 3,156.96-4,731.60-1,423.20

Finding the Fourth Proportional to 3,156.96, 4,731.60 and 1,423.20

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Solution

The fourth proportional to 3,156.96, 4,731.60 and 1,423.20 is: 2,133.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.96 : 4,731.60 = 1,423.20 : x
  2. Step 2: Convert to fraction form
    3,156.96/4,731.60 = 1,423.20/x
  3. Step 3: Cross multiply
    3,156.96x = 4,731.60 × 1,423.20
  4. Step 4: Simplify right side
    3,156.96x = 6,734,013.12
  5. Step 5: Solve for x
    x = 6,734,013.12/3,156.96
  6. Step 6: Final answer
    x = 2,133.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.