Home / 3,935.10-5,430.32-2,142.54

Finding the Fourth Proportional to 3,935.10, 5,430.32 and 2,142.54

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Solution

The fourth proportional to 3,935.10, 5,430.32 and 2,142.54 is: 2,956.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.10 : 5,430.32 = 2,142.54 : x
  2. Step 2: Convert to fraction form
    3,935.10/5,430.32 = 2,142.54/x
  3. Step 3: Cross multiply
    3,935.10x = 5,430.32 × 2,142.54
  4. Step 4: Simplify right side
    3,935.10x = 11,634,677.81
  5. Step 5: Solve for x
    x = 11,634,677.81/3,935.10
  6. Step 6: Final answer
    x = 2,956.64

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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.