Home / 11,991.57-17,985.30-5,416.21

Finding the Fourth Proportional to 11,991.57, 17,985.30 and 5,416.21

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Solution

The fourth proportional to 11,991.57, 17,985.30 and 5,416.21 is: 8,123.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.57 : 17,985.30 = 5,416.21 : x
  2. Step 2: Convert to fraction form
    11,991.57/17,985.30 = 5,416.21/x
  3. Step 3: Cross multiply
    11,991.57x = 17,985.30 × 5,416.21
  4. Step 4: Simplify right side
    11,991.57x = 97,412,161.71
  5. Step 5: Solve for x
    x = 97,412,161.71/11,991.57
  6. Step 6: Final answer
    x = 8,123.39

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1.5x scale

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.