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Finding the Fourth Proportional to 12,955.32, 19,441.56 and 7,116

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Solution

The fourth proportional to 12,955.32, 19,441.56 and 7,116 is: 10,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.32 : 19,441.56 = 7,116 : x
  2. Step 2: Convert to fraction form
    12,955.32/19,441.56 = 7,116/x
  3. Step 3: Cross multiply
    12,955.32x = 19,441.56 × 7,116
  4. Step 4: Simplify right side
    12,955.32x = 138,346,140.96
  5. Step 5: Solve for x
    x = 138,346,140.96/12,955.32
  6. Step 6: Final answer
    x = 10,678.71

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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.