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Finding the Fourth Proportional to 13,371.22, 20,085.84 and 10,455.22

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Solution

The fourth proportional to 13,371.22, 20,085.84 and 10,455.22 is: 15,705.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,371.22 : 20,085.84 = 10,455.22 : x
  2. Step 2: Convert to fraction form
    13,371.22/20,085.84 = 10,455.22/x
  3. Step 3: Cross multiply
    13,371.22x = 20,085.84 × 10,455.22
  4. Step 4: Simplify right side
    13,371.22x = 210,001,876.08
  5. Step 5: Solve for x
    x = 210,001,876.08/13,371.22
  6. Step 6: Final answer
    x = 15,705.51

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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.