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Finding the Fourth Proportional to 12,955, 19,429.28 and 5,558.62

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Solution

The fourth proportional to 12,955, 19,429.28 and 5,558.62 is: 8,336.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955 : 19,429.28 = 5,558.62 : x
  2. Step 2: Convert to fraction form
    12,955/19,429.28 = 5,558.62/x
  3. Step 3: Cross multiply
    12,955x = 19,429.28 × 5,558.62
  4. Step 4: Simplify right side
    12,955x = 107,999,984.39
  5. Step 5: Solve for x
    x = 107,999,984.39/12,955
  6. Step 6: Final answer
    x = 8,336.55

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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.