Home / 15,455.76-21,328.56-9,168

Finding the Fourth Proportional to 15,455.76, 21,328.56 and 9,168

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Solution

The fourth proportional to 15,455.76, 21,328.56 and 9,168 is: 12,651.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.76 : 21,328.56 = 9,168 : x
  2. Step 2: Convert to fraction form
    15,455.76/21,328.56 = 9,168/x
  3. Step 3: Cross multiply
    15,455.76x = 21,328.56 × 9,168
  4. Step 4: Simplify right side
    15,455.76x = 195,540,238.08
  5. Step 5: Solve for x
    x = 195,540,238.08/15,455.76
  6. Step 6: Final answer
    x = 12,651.61

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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.