Home / 3,129.16-4,670.65-2,760.20

Finding the Fourth Proportional to 3,129.16, 4,670.65 and 2,760.20

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Solution

The fourth proportional to 3,129.16, 4,670.65 and 2,760.20 is: 4,119.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.16 : 4,670.65 = 2,760.20 : x
  2. Step 2: Convert to fraction form
    3,129.16/4,670.65 = 2,760.20/x
  3. Step 3: Cross multiply
    3,129.16x = 4,670.65 × 2,760.20
  4. Step 4: Simplify right side
    3,129.16x = 12,891,928.13
  5. Step 5: Solve for x
    x = 12,891,928.13/3,129.16
  6. Step 6: Final answer
    x = 4,119.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.