Home / 3,109.46-4,292.88-1,931.18

Finding the Fourth Proportional to 3,109.46, 4,292.88 and 1,931.18

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Solution

The fourth proportional to 3,109.46, 4,292.88 and 1,931.18 is: 2,666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.46 : 4,292.88 = 1,931.18 : x
  2. Step 2: Convert to fraction form
    3,109.46/4,292.88 = 1,931.18/x
  3. Step 3: Cross multiply
    3,109.46x = 4,292.88 × 1,931.18
  4. Step 4: Simplify right side
    3,109.46x = 8,290,324.00
  5. Step 5: Solve for x
    x = 8,290,324.00/3,109.46
  6. Step 6: Final answer
    x = 2,666.16

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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.