Home / 2,181.92-3,011.08-1,187.20

Finding the Fourth Proportional to 2,181.92, 3,011.08 and 1,187.20

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Solution

The fourth proportional to 2,181.92, 3,011.08 and 1,187.20 is: 1,638.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.92 : 3,011.08 = 1,187.20 : x
  2. Step 2: Convert to fraction form
    2,181.92/3,011.08 = 1,187.20/x
  3. Step 3: Cross multiply
    2,181.92x = 3,011.08 × 1,187.20
  4. Step 4: Simplify right side
    2,181.92x = 3,574,752.07
  5. Step 5: Solve for x
    x = 3,574,752.07/2,181.92
  6. Step 6: Final answer
    x = 1,638.35

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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.