Home / 5,160.10-7,120.82-2,921.92

Finding the Fourth Proportional to 5,160.10, 7,120.82 and 2,921.92

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Solution

The fourth proportional to 5,160.10, 7,120.82 and 2,921.92 is: 4,032.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.10 : 7,120.82 = 2,921.92 : x
  2. Step 2: Convert to fraction form
    5,160.10/7,120.82 = 2,921.92/x
  3. Step 3: Cross multiply
    5,160.10x = 7,120.82 × 2,921.92
  4. Step 4: Simplify right side
    5,160.10x = 20,806,466.37
  5. Step 5: Solve for x
    x = 20,806,466.37/5,160.10
  6. Step 6: Final answer
    x = 4,032.18

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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.