Home / 21,991.04-30,336.48-13,911.10

Finding the Fourth Proportional to 21,991.04, 30,336.48 and 13,911.10

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Solution

The fourth proportional to 21,991.04, 30,336.48 and 13,911.10 is: 19,190.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.04 : 30,336.48 = 13,911.10 : x
  2. Step 2: Convert to fraction form
    21,991.04/30,336.48 = 13,911.10/x
  3. Step 3: Cross multiply
    21,991.04x = 30,336.48 × 13,911.10
  4. Step 4: Simplify right side
    21,991.04x = 422,013,806.93
  5. Step 5: Solve for x
    x = 422,013,806.93/21,991.04
  6. Step 6: Final answer
    x = 19,190.26

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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.