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Finding the Fourth Proportional to 39,871, 55,024.50 and 21,966.04

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Solution

The fourth proportional to 39,871, 55,024.50 and 21,966.04 is: 30,314.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,871 : 55,024.50 = 21,966.04 : x
  2. Step 2: Convert to fraction form
    39,871/55,024.50 = 21,966.04/x
  3. Step 3: Cross multiply
    39,871x = 55,024.50 × 21,966.04
  4. Step 4: Simplify right side
    39,871x = 1,208,670,367.98
  5. Step 5: Solve for x
    x = 1,208,670,367.98/39,871
  6. Step 6: Final answer
    x = 30,314.52

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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.