Home / 30,625.29-42,266.81-18,686.09

Finding the Fourth Proportional to 30,625.29, 42,266.81 and 18,686.09

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Solution

The fourth proportional to 30,625.29, 42,266.81 and 18,686.09 is: 25,789.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,625.29 : 42,266.81 = 18,686.09 : x
  2. Step 2: Convert to fraction form
    30,625.29/42,266.81 = 18,686.09/x
  3. Step 3: Cross multiply
    30,625.29x = 42,266.81 × 18,686.09
  4. Step 4: Simplify right side
    30,625.29x = 789,801,568.06
  5. Step 5: Solve for x
    x = 789,801,568.06/30,625.29
  6. Step 6: Final answer
    x = 25,789.19

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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.