Home / 2,095.20-3,138.60-1,312.80

Finding the Fourth Proportional to 2,095.20, 3,138.60 and 1,312.80

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Solution

The fourth proportional to 2,095.20, 3,138.60 and 1,312.80 is: 1,966.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,095.20 : 3,138.60 = 1,312.80 : x
  2. Step 2: Convert to fraction form
    2,095.20/3,138.60 = 1,312.80/x
  3. Step 3: Cross multiply
    2,095.20x = 3,138.60 × 1,312.80
  4. Step 4: Simplify right side
    2,095.20x = 4,120,354.08
  5. Step 5: Solve for x
    x = 4,120,354.08/2,095.20
  6. Step 6: Final answer
    x = 1,966.57

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1.5x scale

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.