Home / 12,402.72-17,120.16-8,212.32

Finding the Fourth Proportional to 12,402.72, 17,120.16 and 8,212.32

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Solution

The fourth proportional to 12,402.72, 17,120.16 and 8,212.32 is: 11,335.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.72 : 17,120.16 = 8,212.32 : x
  2. Step 2: Convert to fraction form
    12,402.72/17,120.16 = 8,212.32/x
  3. Step 3: Cross multiply
    12,402.72x = 17,120.16 × 8,212.32
  4. Step 4: Simplify right side
    12,402.72x = 140,596,232.37
  5. Step 5: Solve for x
    x = 140,596,232.37/12,402.72
  6. Step 6: Final answer
    x = 11,335.92

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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.