Home / 13,219.82-18,228.40-8,433.36

Finding the Fourth Proportional to 13,219.82, 18,228.40 and 8,433.36

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Solution

The fourth proportional to 13,219.82, 18,228.40 and 8,433.36 is: 11,628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.82 : 18,228.40 = 8,433.36 : x
  2. Step 2: Convert to fraction form
    13,219.82/18,228.40 = 8,433.36/x
  3. Step 3: Cross multiply
    13,219.82x = 18,228.40 × 8,433.36
  4. Step 4: Simplify right side
    13,219.82x = 153,726,638.34
  5. Step 5: Solve for x
    x = 153,726,638.34/13,219.82
  6. Step 6: Final answer
    x = 11,628.50

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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.