Home / 3,109.10-4,291.29-1,931.06

Finding the Fourth Proportional to 3,109.10, 4,291.29 and 1,931.06

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Solution

The fourth proportional to 3,109.10, 4,291.29 and 1,931.06 is: 2,665.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.10 : 4,291.29 = 1,931.06 : x
  2. Step 2: Convert to fraction form
    3,109.10/4,291.29 = 1,931.06/x
  3. Step 3: Cross multiply
    3,109.10x = 4,291.29 × 1,931.06
  4. Step 4: Simplify right side
    3,109.10x = 8,286,738.47
  5. Step 5: Solve for x
    x = 8,286,738.47/3,109.10
  6. Step 6: Final answer
    x = 2,665.32

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Double 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.