Home / 39,786.60-54,903.99-21,881.40

Finding the Fourth Proportional to 39,786.60, 54,903.99 and 21,881.40

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Solution

The fourth proportional to 39,786.60, 54,903.99 and 21,881.40 is: 30,195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.60 : 54,903.99 = 21,881.40 : x
  2. Step 2: Convert to fraction form
    39,786.60/54,903.99 = 21,881.40/x
  3. Step 3: Cross multiply
    39,786.60x = 54,903.99 × 21,881.40
  4. Step 4: Simplify right side
    39,786.60x = 1,201,376,166.79
  5. Step 5: Solve for x
    x = 1,201,376,166.79/39,786.60
  6. Step 6: Final answer
    x = 30,195.50

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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.