Home / 11,238.30-16,857.45-8,111.70

Finding the Fourth Proportional to 11,238.30, 16,857.45 and 8,111.70

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Solution

The fourth proportional to 11,238.30, 16,857.45 and 8,111.70 is: 12,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,238.30 : 16,857.45 = 8,111.70 : x
  2. Step 2: Convert to fraction form
    11,238.30/16,857.45 = 8,111.70/x
  3. Step 3: Cross multiply
    11,238.30x = 16,857.45 × 8,111.70
  4. Step 4: Simplify right side
    11,238.30x = 136,742,577.17
  5. Step 5: Solve for x
    x = 136,742,577.17/11,238.30
  6. Step 6: Final answer
    x = 12,167.55

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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.