Home / 30,768.27-42,439.14-18,837.50

Finding the Fourth Proportional to 30,768.27, 42,439.14 and 18,837.50

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Solution

The fourth proportional to 30,768.27, 42,439.14 and 18,837.50 is: 25,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,768.27 : 42,439.14 = 18,837.50 : x
  2. Step 2: Convert to fraction form
    30,768.27/42,439.14 = 18,837.50/x
  3. Step 3: Cross multiply
    30,768.27x = 42,439.14 × 18,837.50
  4. Step 4: Simplify right side
    30,768.27x = 799,447,311.66
  5. Step 5: Solve for x
    x = 799,447,311.66/30,768.27
  6. Step 6: Final answer
    x = 25,982.85

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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.