Home / 2,886.32-3,980.45-2,142.14

Finding the Fourth Proportional to 2,886.32, 3,980.45 and 2,142.14

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Solution

The fourth proportional to 2,886.32, 3,980.45 and 2,142.14 is: 2,954.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.32 : 3,980.45 = 2,142.14 : x
  2. Step 2: Convert to fraction form
    2,886.32/3,980.45 = 2,142.14/x
  3. Step 3: Cross multiply
    2,886.32x = 3,980.45 × 2,142.14
  4. Step 4: Simplify right side
    2,886.32x = 8,526,650.55
  5. Step 5: Solve for x
    x = 8,526,650.55/2,886.32
  6. Step 6: Final answer
    x = 2,954.16

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Half scale
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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.