Home / 2,181.90-3,011.01-1,187.17

Finding the Fourth Proportional to 2,181.90, 3,011.01 and 1,187.17

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Solution

The fourth proportional to 2,181.90, 3,011.01 and 1,187.17 is: 1,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.90 : 3,011.01 = 1,187.17 : x
  2. Step 2: Convert to fraction form
    2,181.90/3,011.01 = 1,187.17/x
  3. Step 3: Cross multiply
    2,181.90x = 3,011.01 × 1,187.17
  4. Step 4: Simplify right side
    2,181.90x = 3,574,585.70
  5. Step 5: Solve for x
    x = 3,574,585.70/2,181.90
  6. Step 6: Final answer
    x = 1,638.29

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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.