Home / 7,122.13-9,828.03-3,935.39

Finding the Fourth Proportional to 7,122.13, 9,828.03 and 3,935.39

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Solution

The fourth proportional to 7,122.13, 9,828.03 and 3,935.39 is: 5,430.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.13 : 9,828.03 = 3,935.39 : x
  2. Step 2: Convert to fraction form
    7,122.13/9,828.03 = 3,935.39/x
  3. Step 3: Cross multiply
    7,122.13x = 9,828.03 × 3,935.39
  4. Step 4: Simplify right side
    7,122.13x = 38,677,130.98
  5. Step 5: Solve for x
    x = 38,677,130.98/7,122.13
  6. Step 6: Final answer
    x = 5,430.56

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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.