Home / 30,726.72-42,390-18,786.24

Finding the Fourth Proportional to 30,726.72, 42,390 and 18,786.24

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Solution

The fourth proportional to 30,726.72, 42,390 and 18,786.24 is: 25,917.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,726.72 : 42,390 = 18,786.24 : x
  2. Step 2: Convert to fraction form
    30,726.72/42,390 = 18,786.24/x
  3. Step 3: Cross multiply
    30,726.72x = 42,390 × 18,786.24
  4. Step 4: Simplify right side
    30,726.72x = 796,348,713.60
  5. Step 5: Solve for x
    x = 796,348,713.60/30,726.72
  6. Step 6: Final answer
    x = 25,917.14

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Double scale
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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.