Home / 3,935.39-5,430.71-2,142.79

Finding the Fourth Proportional to 3,935.39, 5,430.71 and 2,142.79

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Solution

The fourth proportional to 3,935.39, 5,430.71 and 2,142.79 is: 2,956.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.39 : 5,430.71 = 2,142.79 : x
  2. Step 2: Convert to fraction form
    3,935.39/5,430.71 = 2,142.79/x
  3. Step 3: Cross multiply
    3,935.39x = 5,430.71 × 2,142.79
  4. Step 4: Simplify right side
    3,935.39x = 11,636,862.86
  5. Step 5: Solve for x
    x = 11,636,862.86/3,935.39
  6. Step 6: Final answer
    x = 2,956.98

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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.