Home / 13,357.40-18,429.90-8,636

Finding the Fourth Proportional to 13,357.40, 18,429.90 and 8,636

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Solution

The fourth proportional to 13,357.40, 18,429.90 and 8,636 is: 11,915.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,357.40 : 18,429.90 = 8,636 : x
  2. Step 2: Convert to fraction form
    13,357.40/18,429.90 = 8,636/x
  3. Step 3: Cross multiply
    13,357.40x = 18,429.90 × 8,636
  4. Step 4: Simplify right side
    13,357.40x = 159,160,616.40
  5. Step 5: Solve for x
    x = 159,160,616.40/13,357.40
  6. Step 6: Final answer
    x = 11,915.54

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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.