Home / 13,639.29-18,817.83-8,260.01

Finding the Fourth Proportional to 13,639.29, 18,817.83 and 8,260.01

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Solution

The fourth proportional to 13,639.29, 18,817.83 and 8,260.01 is: 11,396.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.29 : 18,817.83 = 8,260.01 : x
  2. Step 2: Convert to fraction form
    13,639.29/18,817.83 = 8,260.01/x
  3. Step 3: Cross multiply
    13,639.29x = 18,817.83 × 8,260.01
  4. Step 4: Simplify right side
    13,639.29x = 155,435,369.89
  5. Step 5: Solve for x
    x = 155,435,369.89/13,639.29
  6. Step 6: Final answer
    x = 11,396.15

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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.