Home / 30,621.29-42,254.19-18,687.56

Finding the Fourth Proportional to 30,621.29, 42,254.19 and 18,687.56

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Solution

The fourth proportional to 30,621.29, 42,254.19 and 18,687.56 is: 25,786.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.29 : 42,254.19 = 18,687.56 : x
  2. Step 2: Convert to fraction form
    30,621.29/42,254.19 = 18,687.56/x
  3. Step 3: Cross multiply
    30,621.29x = 42,254.19 × 18,687.56
  4. Step 4: Simplify right side
    30,621.29x = 789,627,499.61
  5. Step 5: Solve for x
    x = 789,627,499.61/30,621.29
  6. Step 6: Final answer
    x = 25,786.88

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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.