Home / 3,109.32-4,290.98-1,931.04

Finding the Fourth Proportional to 3,109.32, 4,290.98 and 1,931.04

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Solution

The fourth proportional to 3,109.32, 4,290.98 and 1,931.04 is: 2,664.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.32 : 4,290.98 = 1,931.04 : x
  2. Step 2: Convert to fraction form
    3,109.32/4,290.98 = 1,931.04/x
  3. Step 3: Cross multiply
    3,109.32x = 4,290.98 × 1,931.04
  4. Step 4: Simplify right side
    3,109.32x = 8,286,044.36
  5. Step 5: Solve for x
    x = 8,286,044.36/3,109.32
  6. Step 6: Final answer
    x = 2,664.91

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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.