Home / 13,319.64-19,968.12-8,129.16

Finding the Fourth Proportional to 13,319.64, 19,968.12 and 8,129.16

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Solution

The fourth proportional to 13,319.64, 19,968.12 and 8,129.16 is: 12,186.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.64 : 19,968.12 = 8,129.16 : x
  2. Step 2: Convert to fraction form
    13,319.64/19,968.12 = 8,129.16/x
  3. Step 3: Cross multiply
    13,319.64x = 19,968.12 × 8,129.16
  4. Step 4: Simplify right side
    13,319.64x = 162,324,042.38
  5. Step 5: Solve for x
    x = 162,324,042.38/13,319.64
  6. Step 6: Final answer
    x = 12,186.82

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1.5x scale

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.