Home / 30,626.79-42,268.89-18,687.60

Finding the Fourth Proportional to 30,626.79, 42,268.89 and 18,687.60

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Solution

The fourth proportional to 30,626.79, 42,268.89 and 18,687.60 is: 25,791.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,626.79 : 42,268.89 = 18,687.60 : x
  2. Step 2: Convert to fraction form
    30,626.79/42,268.89 = 18,687.60/x
  3. Step 3: Cross multiply
    30,626.79x = 42,268.89 × 18,687.60
  4. Step 4: Simplify right side
    30,626.79x = 789,904,108.76
  5. Step 5: Solve for x
    x = 789,904,108.76/30,626.79
  6. Step 6: Final answer
    x = 25,791.28

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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.