Home / 21,991.57-30,352.43-12,560.13

Finding the Fourth Proportional to 21,991.57, 30,352.43 and 12,560.13

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Solution

The fourth proportional to 21,991.57, 30,352.43 and 12,560.13 is: 17,335.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.57 : 30,352.43 = 12,560.13 : x
  2. Step 2: Convert to fraction form
    21,991.57/30,352.43 = 12,560.13/x
  3. Step 3: Cross multiply
    21,991.57x = 30,352.43 × 12,560.13
  4. Step 4: Simplify right side
    21,991.57x = 381,230,611.84
  5. Step 5: Solve for x
    x = 381,230,611.84/21,991.57
  6. Step 6: Final answer
    x = 17,335.31

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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.