Home / 3,129.76-4,317.60-2,082.16

Finding the Fourth Proportional to 3,129.76, 4,317.60 and 2,082.16

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Solution

The fourth proportional to 3,129.76, 4,317.60 and 2,082.16 is: 2,872.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.76 : 4,317.60 = 2,082.16 : x
  2. Step 2: Convert to fraction form
    3,129.76/4,317.60 = 2,082.16/x
  3. Step 3: Cross multiply
    3,129.76x = 4,317.60 × 2,082.16
  4. Step 4: Simplify right side
    3,129.76x = 8,989,934.02
  5. Step 5: Solve for x
    x = 8,989,934.02/3,129.76
  6. Step 6: Final answer
    x = 2,872.40

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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.