Home / 3,137.40-4,328.10-1,878.12

Finding the Fourth Proportional to 3,137.40, 4,328.10 and 1,878.12

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Solution

The fourth proportional to 3,137.40, 4,328.10 and 1,878.12 is: 2,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.40 : 4,328.10 = 1,878.12 : x
  2. Step 2: Convert to fraction form
    3,137.40/4,328.10 = 1,878.12/x
  3. Step 3: Cross multiply
    3,137.40x = 4,328.10 × 1,878.12
  4. Step 4: Simplify right side
    3,137.40x = 8,128,691.17
  5. Step 5: Solve for x
    x = 8,128,691.17/3,137.40
  6. Step 6: Final answer
    x = 2,590.90

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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.