Home / 13,152.24-18,152.64-8,678.88

Finding the Fourth Proportional to 13,152.24, 18,152.64 and 8,678.88

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Solution

The fourth proportional to 13,152.24, 18,152.64 and 8,678.88 is: 11,978.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,152.24 : 18,152.64 = 8,678.88 : x
  2. Step 2: Convert to fraction form
    13,152.24/18,152.64 = 8,678.88/x
  3. Step 3: Cross multiply
    13,152.24x = 18,152.64 × 8,678.88
  4. Step 4: Simplify right side
    13,152.24x = 157,544,584.24
  5. Step 5: Solve for x
    x = 157,544,584.24/13,152.24
  6. Step 6: Final answer
    x = 11,978.54

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1.5x scale

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.