Home / 11,120.48-15,347.03-7,142.84

Finding the Fourth Proportional to 11,120.48, 15,347.03 and 7,142.84

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Solution

The fourth proportional to 11,120.48, 15,347.03 and 7,142.84 is: 9,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120.48 : 15,347.03 = 7,142.84 : x
  2. Step 2: Convert to fraction form
    11,120.48/15,347.03 = 7,142.84/x
  3. Step 3: Cross multiply
    11,120.48x = 15,347.03 × 7,142.84
  4. Step 4: Simplify right side
    11,120.48x = 109,621,379.77
  5. Step 5: Solve for x
    x = 109,621,379.77/11,120.48
  6. Step 6: Final answer
    x = 9,857.61

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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.