Home / 21,991.89-30,352.87-12,560.45

Finding the Fourth Proportional to 21,991.89, 30,352.87 and 12,560.45

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Solution

The fourth proportional to 21,991.89, 30,352.87 and 12,560.45 is: 17,335.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.89 : 30,352.87 = 12,560.45 : x
  2. Step 2: Convert to fraction form
    21,991.89/30,352.87 = 12,560.45/x
  3. Step 3: Cross multiply
    21,991.89x = 30,352.87 × 12,560.45
  4. Step 4: Simplify right side
    21,991.89x = 381,245,705.99
  5. Step 5: Solve for x
    x = 381,245,705.99/21,991.89
  6. Step 6: Final answer
    x = 17,335.74

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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.