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Finding the Fourth Proportional to 27,358.80, 41,038.20 and 21,721.20

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Solution

The fourth proportional to 27,358.80, 41,038.20 and 21,721.20 is: 32,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,358.80 : 41,038.20 = 21,721.20 : x
  2. Step 2: Convert to fraction form
    27,358.80/41,038.20 = 21,721.20/x
  3. Step 3: Cross multiply
    27,358.80x = 41,038.20 × 21,721.20
  4. Step 4: Simplify right side
    27,358.80x = 891,398,949.84
  5. Step 5: Solve for x
    x = 891,398,949.84/27,358.80
  6. Step 6: Final answer
    x = 32,581.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.