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Finding the Fourth Proportional to 31,679.84, 43,722.81 and 18,248.51

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Solution

The fourth proportional to 31,679.84, 43,722.81 and 18,248.51 is: 25,185.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,679.84 : 43,722.81 = 18,248.51 : x
  2. Step 2: Convert to fraction form
    31,679.84/43,722.81 = 18,248.51/x
  3. Step 3: Cross multiply
    31,679.84x = 43,722.81 × 18,248.51
  4. Step 4: Simplify right side
    31,679.84x = 797,875,916.90
  5. Step 5: Solve for x
    x = 797,875,916.90/31,679.84
  6. Step 6: Final answer
    x = 25,185.61

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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.