Home / 28,651.64-42,976.90-11,780.96

Finding the Fourth Proportional to 28,651.64, 42,976.90 and 11,780.96

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Solution

The fourth proportional to 28,651.64, 42,976.90 and 11,780.96 is: 17,671.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.64 : 42,976.90 = 11,780.96 : x
  2. Step 2: Convert to fraction form
    28,651.64/42,976.90 = 11,780.96/x
  3. Step 3: Cross multiply
    28,651.64x = 42,976.90 × 11,780.96
  4. Step 4: Simplify right side
    28,651.64x = 506,309,139.82
  5. Step 5: Solve for x
    x = 506,309,139.82/28,651.64
  6. Step 6: Final answer
    x = 17,671.21

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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.