Home / 5,160.16-7,121.21-2,921.93

Finding the Fourth Proportional to 5,160.16, 7,121.21 and 2,921.93

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Solution

The fourth proportional to 5,160.16, 7,121.21 and 2,921.93 is: 4,032.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.16 : 7,121.21 = 2,921.93 : x
  2. Step 2: Convert to fraction form
    5,160.16/7,121.21 = 2,921.93/x
  3. Step 3: Cross multiply
    5,160.16x = 7,121.21 × 2,921.93
  4. Step 4: Simplify right side
    5,160.16x = 20,807,677.14
  5. Step 5: Solve for x
    x = 20,807,677.14/5,160.16
  6. Step 6: Final answer
    x = 4,032.37

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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.