Home / 13,639.32-18,815.59-8,324.91

Finding the Fourth Proportional to 13,639.32, 18,815.59 and 8,324.91

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Solution

The fourth proportional to 13,639.32, 18,815.59 and 8,324.91 is: 11,484.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.32 : 18,815.59 = 8,324.91 : x
  2. Step 2: Convert to fraction form
    13,639.32/18,815.59 = 8,324.91/x
  3. Step 3: Cross multiply
    13,639.32x = 18,815.59 × 8,324.91
  4. Step 4: Simplify right side
    13,639.32x = 156,638,103.75
  5. Step 5: Solve for x
    x = 156,638,103.75/13,639.32
  6. Step 6: Final answer
    x = 11,484.30

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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.