Home / 39,390.69-54,360.18-21,486

Finding the Fourth Proportional to 39,390.69, 54,360.18 and 21,486

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Solution

The fourth proportional to 39,390.69, 54,360.18 and 21,486 is: 29,651.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390.69 : 54,360.18 = 21,486 : x
  2. Step 2: Convert to fraction form
    39,390.69/54,360.18 = 21,486/x
  3. Step 3: Cross multiply
    39,390.69x = 54,360.18 × 21,486
  4. Step 4: Simplify right side
    39,390.69x = 1,167,982,827.48
  5. Step 5: Solve for x
    x = 1,167,982,827.48/39,390.69
  6. Step 6: Final answer
    x = 29,651.24

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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.