Home / 28,489.86-42,711.39-18,504.90

Finding the Fourth Proportional to 28,489.86, 42,711.39 and 18,504.90

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Solution

The fourth proportional to 28,489.86, 42,711.39 and 18,504.90 is: 27,742.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.86 : 42,711.39 = 18,504.90 : x
  2. Step 2: Convert to fraction form
    28,489.86/42,711.39 = 18,504.90/x
  3. Step 3: Cross multiply
    28,489.86x = 42,711.39 × 18,504.90
  4. Step 4: Simplify right side
    28,489.86x = 790,370,000.81
  5. Step 5: Solve for x
    x = 790,370,000.81/28,489.86
  6. Step 6: Final answer
    x = 27,742.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.