Home / 20,374.77-28,116-11,420.64

Finding the Fourth Proportional to 20,374.77, 28,116 and 11,420.64

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Solution

The fourth proportional to 20,374.77, 28,116 and 11,420.64 is: 15,759.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.77 : 28,116 = 11,420.64 : x
  2. Step 2: Convert to fraction form
    20,374.77/28,116 = 11,420.64/x
  3. Step 3: Cross multiply
    20,374.77x = 28,116 × 11,420.64
  4. Step 4: Simplify right side
    20,374.77x = 321,102,714.24
  5. Step 5: Solve for x
    x = 321,102,714.24/20,374.77
  6. Step 6: Final answer
    x = 15,759.82

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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.