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Finding the Fourth Proportional to 39,986.68, 59,921.68 and 22,490.68

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Solution

The fourth proportional to 39,986.68, 59,921.68 and 22,490.68 is: 33,703.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,986.68 : 59,921.68 = 22,490.68 : x
  2. Step 2: Convert to fraction form
    39,986.68/59,921.68 = 22,490.68/x
  3. Step 3: Cross multiply
    39,986.68x = 59,921.68 × 22,490.68
  4. Step 4: Simplify right side
    39,986.68x = 1,347,679,329.94
  5. Step 5: Solve for x
    x = 1,347,679,329.94/39,986.68
  6. Step 6: Final answer
    x = 33,703.21

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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.