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Finding the Fourth Proportional to 39,398.77, 54,369.23 and 21,493.77

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Solution

The fourth proportional to 39,398.77, 54,369.23 and 21,493.77 is: 29,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,398.77 : 54,369.23 = 21,493.77 : x
  2. Step 2: Convert to fraction form
    39,398.77/54,369.23 = 21,493.77/x
  3. Step 3: Cross multiply
    39,398.77x = 54,369.23 × 21,493.77
  4. Step 4: Simplify right side
    39,398.77x = 1,168,599,617.23
  5. Step 5: Solve for x
    x = 1,168,599,617.23/39,398.77
  6. Step 6: Final answer
    x = 29,660.81

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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.