Home / 39,487-54,491.61-21,581.95

Finding the Fourth Proportional to 39,487, 54,491.61 and 21,581.95

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Solution

The fourth proportional to 39,487, 54,491.61 and 21,581.95 is: 29,782.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,487 : 54,491.61 = 21,581.95 : x
  2. Step 2: Convert to fraction form
    39,487/54,491.61 = 21,581.95/x
  3. Step 3: Cross multiply
    39,487x = 54,491.61 × 21,581.95
  4. Step 4: Simplify right side
    39,487x = 1,176,035,202.44
  5. Step 5: Solve for x
    x = 1,176,035,202.44/39,487
  6. Step 6: Final answer
    x = 29,782.85

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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.