Home / 3,146.90-4,341.75-1,820.12

Finding the Fourth Proportional to 3,146.90, 4,341.75 and 1,820.12

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Solution

The fourth proportional to 3,146.90, 4,341.75 and 1,820.12 is: 2,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.90 : 4,341.75 = 1,820.12 : x
  2. Step 2: Convert to fraction form
    3,146.90/4,341.75 = 1,820.12/x
  3. Step 3: Cross multiply
    3,146.90x = 4,341.75 × 1,820.12
  4. Step 4: Simplify right side
    3,146.90x = 7,902,506.01
  5. Step 5: Solve for x
    x = 7,902,506.01/3,146.90
  6. Step 6: Final answer
    x = 2,511.20

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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.