Home / 30,928.86-42,672-18,177.96

Finding the Fourth Proportional to 30,928.86, 42,672 and 18,177.96

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Solution

The fourth proportional to 30,928.86, 42,672 and 18,177.96 is: 25,079.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.86 : 42,672 = 18,177.96 : x
  2. Step 2: Convert to fraction form
    30,928.86/42,672 = 18,177.96/x
  3. Step 3: Cross multiply
    30,928.86x = 42,672 × 18,177.96
  4. Step 4: Simplify right side
    30,928.86x = 775,689,909.12
  5. Step 5: Solve for x
    x = 775,689,909.12/30,928.86
  6. Step 6: Final answer
    x = 25,079.81

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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.