Home / 13,382.16-18,469.31-8,077.74

Finding the Fourth Proportional to 13,382.16, 18,469.31 and 8,077.74

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Solution

The fourth proportional to 13,382.16, 18,469.31 and 8,077.74 is: 11,148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.16 : 18,469.31 = 8,077.74 : x
  2. Step 2: Convert to fraction form
    13,382.16/18,469.31 = 8,077.74/x
  3. Step 3: Cross multiply
    13,382.16x = 18,469.31 × 8,077.74
  4. Step 4: Simplify right side
    13,382.16x = 149,190,284.16
  5. Step 5: Solve for x
    x = 149,190,284.16/13,382.16
  6. Step 6: Final answer
    x = 11,148.45

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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.