Home / 21,991.77-30,348.27-12,431.50

Finding the Fourth Proportional to 21,991.77, 30,348.27 and 12,431.50

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Solution

The fourth proportional to 21,991.77, 30,348.27 and 12,431.50 is: 17,155.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.77 : 30,348.27 = 12,431.50 : x
  2. Step 2: Convert to fraction form
    21,991.77/30,348.27 = 12,431.50/x
  3. Step 3: Cross multiply
    21,991.77x = 30,348.27 × 12,431.50
  4. Step 4: Simplify right side
    21,991.77x = 377,274,527.99
  5. Step 5: Solve for x
    x = 377,274,527.99/21,991.77
  6. Step 6: Final answer
    x = 17,155.26

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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.