Home / 11,521.45-15,900.40-6,486.09

Finding the Fourth Proportional to 11,521.45, 15,900.40 and 6,486.09

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Solution

The fourth proportional to 11,521.45, 15,900.40 and 6,486.09 is: 8,951.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,521.45 : 15,900.40 = 6,486.09 : x
  2. Step 2: Convert to fraction form
    11,521.45/15,900.40 = 6,486.09/x
  3. Step 3: Cross multiply
    11,521.45x = 15,900.40 × 6,486.09
  4. Step 4: Simplify right side
    11,521.45x = 103,131,373.92
  5. Step 5: Solve for x
    x = 103,131,373.92/11,521.45
  6. Step 6: Final answer
    x = 8,951.25

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Half scale
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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.