Home / 28,487.55-42,734.81-11,858.86

Finding the Fourth Proportional to 28,487.55, 42,734.81 and 11,858.86

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Solution

The fourth proportional to 28,487.55, 42,734.81 and 11,858.86 is: 17,789.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.55 : 42,734.81 = 11,858.86 : x
  2. Step 2: Convert to fraction form
    28,487.55/42,734.81 = 11,858.86/x
  3. Step 3: Cross multiply
    28,487.55x = 42,734.81 × 11,858.86
  4. Step 4: Simplify right side
    28,487.55x = 506,786,128.92
  5. Step 5: Solve for x
    x = 506,786,128.92/28,487.55
  6. Step 6: Final answer
    x = 17,789.74

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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.