Home / 12,688.18-19,054.05-7,786.60

Finding the Fourth Proportional to 12,688.18, 19,054.05 and 7,786.60

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Solution

The fourth proportional to 12,688.18, 19,054.05 and 7,786.60 is: 11,693.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.18 : 19,054.05 = 7,786.60 : x
  2. Step 2: Convert to fraction form
    12,688.18/19,054.05 = 7,786.60/x
  3. Step 3: Cross multiply
    12,688.18x = 19,054.05 × 7,786.60
  4. Step 4: Simplify right side
    12,688.18x = 148,366,265.73
  5. Step 5: Solve for x
    x = 148,366,265.73/12,688.18
  6. Step 6: Final answer
    x = 11,693.27

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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.