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Finding the Fourth Proportional to 39,990.84, 55,181.01 and 22,991.77

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Solution

The fourth proportional to 39,990.84, 55,181.01 and 22,991.77 is: 31,724.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.84 : 55,181.01 = 22,991.77 : x
  2. Step 2: Convert to fraction form
    39,990.84/55,181.01 = 22,991.77/x
  3. Step 3: Cross multiply
    39,990.84x = 55,181.01 × 22,991.77
  4. Step 4: Simplify right side
    39,990.84x = 1,268,709,090.29
  5. Step 5: Solve for x
    x = 1,268,709,090.29/39,990.84
  6. Step 6: Final answer
    x = 31,724.99

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1.5x scale

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.