Home / 13,149-19,723.90-5,143.45

Finding the Fourth Proportional to 13,149, 19,723.90 and 5,143.45

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Solution

The fourth proportional to 13,149, 19,723.90 and 5,143.45 is: 7,715.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149 : 19,723.90 = 5,143.45 : x
  2. Step 2: Convert to fraction form
    13,149/19,723.90 = 5,143.45/x
  3. Step 3: Cross multiply
    13,149x = 19,723.90 × 5,143.45
  4. Step 4: Simplify right side
    13,149x = 101,448,807.97
  5. Step 5: Solve for x
    x = 101,448,807.97/13,149
  6. Step 6: Final answer
    x = 7,715.32

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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.