Home / 39,418.42-54,397.61-21,513.81

Finding the Fourth Proportional to 39,418.42, 54,397.61 and 21,513.81

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Solution

The fourth proportional to 39,418.42, 54,397.61 and 21,513.81 is: 29,689.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418.42 : 54,397.61 = 21,513.81 : x
  2. Step 2: Convert to fraction form
    39,418.42/54,397.61 = 21,513.81/x
  3. Step 3: Cross multiply
    39,418.42x = 54,397.61 × 21,513.81
  4. Step 4: Simplify right side
    39,418.42x = 1,170,299,845.99
  5. Step 5: Solve for x
    x = 1,170,299,845.99/39,418.42
  6. Step 6: Final answer
    x = 29,689.16

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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.