Home / 3,935.08-5,430.37-2,166.65

Finding the Fourth Proportional to 3,935.08, 5,430.37 and 2,166.65

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Solution

The fourth proportional to 3,935.08, 5,430.37 and 2,166.65 is: 2,989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.08 : 5,430.37 = 2,166.65 : x
  2. Step 2: Convert to fraction form
    3,935.08/5,430.37 = 2,166.65/x
  3. Step 3: Cross multiply
    3,935.08x = 5,430.37 × 2,166.65
  4. Step 4: Simplify right side
    3,935.08x = 11,765,711.16
  5. Step 5: Solve for x
    x = 11,765,711.16/3,935.08
  6. Step 6: Final answer
    x = 2,989.95

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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.