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Finding the Fourth Proportional to 7,048.40, 9,726.78 and 3,904.59

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Solution

The fourth proportional to 7,048.40, 9,726.78 and 3,904.59 is: 5,388.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,048.40 : 9,726.78 = 3,904.59 : x
  2. Step 2: Convert to fraction form
    7,048.40/9,726.78 = 3,904.59/x
  3. Step 3: Cross multiply
    7,048.40x = 9,726.78 × 3,904.59
  4. Step 4: Simplify right side
    7,048.40x = 37,979,087.92
  5. Step 5: Solve for x
    x = 37,979,087.92/7,048.40
  6. Step 6: Final answer
    x = 5,388.33

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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.