Home / 7,122.09-9,828.45-3,935.61

Finding the Fourth Proportional to 7,122.09, 9,828.45 and 3,935.61

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Solution

The fourth proportional to 7,122.09, 9,828.45 and 3,935.61 is: 5,431.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.09 : 9,828.45 = 3,935.61 : x
  2. Step 2: Convert to fraction form
    7,122.09/9,828.45 = 3,935.61/x
  3. Step 3: Cross multiply
    7,122.09x = 9,828.45 × 3,935.61
  4. Step 4: Simplify right side
    7,122.09x = 38,680,946.10
  5. Step 5: Solve for x
    x = 38,680,946.10/7,122.09
  6. Step 6: Final answer
    x = 5,431.12

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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.