Home / 13,143.84-19,715.28-3,909.60

Finding the Fourth Proportional to 13,143.84, 19,715.28 and 3,909.60

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Solution

The fourth proportional to 13,143.84, 19,715.28 and 3,909.60 is: 5,864.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.84 : 19,715.28 = 3,909.60 : x
  2. Step 2: Convert to fraction form
    13,143.84/19,715.28 = 3,909.60/x
  3. Step 3: Cross multiply
    13,143.84x = 19,715.28 × 3,909.60
  4. Step 4: Simplify right side
    13,143.84x = 77,078,858.69
  5. Step 5: Solve for x
    x = 77,078,858.69/13,143.84
  6. Step 6: Final answer
    x = 5,864.26

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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.