Home / 12,811.08-17,677.26-7,221

Finding the Fourth Proportional to 12,811.08, 17,677.26 and 7,221

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Solution

The fourth proportional to 12,811.08, 17,677.26 and 7,221 is: 9,963.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.08 : 17,677.26 = 7,221 : x
  2. Step 2: Convert to fraction form
    12,811.08/17,677.26 = 7,221/x
  3. Step 3: Cross multiply
    12,811.08x = 17,677.26 × 7,221
  4. Step 4: Simplify right side
    12,811.08x = 127,647,494.46
  5. Step 5: Solve for x
    x = 127,647,494.46/12,811.08
  6. Step 6: Final answer
    x = 9,963.84

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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.