Home / 11,988.24-17,991.96-5,415

Finding the Fourth Proportional to 11,988.24, 17,991.96 and 5,415

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Solution

The fourth proportional to 11,988.24, 17,991.96 and 5,415 is: 8,126.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.24 : 17,991.96 = 5,415 : x
  2. Step 2: Convert to fraction form
    11,988.24/17,991.96 = 5,415/x
  3. Step 3: Cross multiply
    11,988.24x = 17,991.96 × 5,415
  4. Step 4: Simplify right side
    11,988.24x = 97,426,463.40
  5. Step 5: Solve for x
    x = 97,426,463.40/11,988.24
  6. Step 6: Final answer
    x = 8,126.84

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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.