Home / 7,819.10-11,730.85-3,142.40

Finding the Fourth Proportional to 7,819.10, 11,730.85 and 3,142.40

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Solution

The fourth proportional to 7,819.10, 11,730.85 and 3,142.40 is: 4,714.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.10 : 11,730.85 = 3,142.40 : x
  2. Step 2: Convert to fraction form
    7,819.10/11,730.85 = 3,142.40/x
  3. Step 3: Cross multiply
    7,819.10x = 11,730.85 × 3,142.40
  4. Step 4: Simplify right side
    7,819.10x = 36,862,956.53
  5. Step 5: Solve for x
    x = 36,862,956.53/7,819.10
  6. Step 6: Final answer
    x = 4,714.48

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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.