Home / 30,558.39-45,731.88-21,135.15

Finding the Fourth Proportional to 30,558.39, 45,731.88 and 21,135.15

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Solution

The fourth proportional to 30,558.39, 45,731.88 and 21,135.15 is: 31,629.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,558.39 : 45,731.88 = 21,135.15 : x
  2. Step 2: Convert to fraction form
    30,558.39/45,731.88 = 21,135.15/x
  3. Step 3: Cross multiply
    30,558.39x = 45,731.88 × 21,135.15
  4. Step 4: Simplify right side
    30,558.39x = 966,550,143.58
  5. Step 5: Solve for x
    x = 966,550,143.58/30,558.39
  6. Step 6: Final answer
    x = 31,629.62

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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.