Home / 15,724.43-21,709.41-10,821.50

Finding the Fourth Proportional to 15,724.43, 21,709.41 and 10,821.50

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Solution

The fourth proportional to 15,724.43, 21,709.41 and 10,821.50 is: 14,940.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.43 : 21,709.41 = 10,821.50 : x
  2. Step 2: Convert to fraction form
    15,724.43/21,709.41 = 10,821.50/x
  3. Step 3: Cross multiply
    15,724.43x = 21,709.41 × 10,821.50
  4. Step 4: Simplify right side
    15,724.43x = 234,928,380.32
  5. Step 5: Solve for x
    x = 234,928,380.32/15,724.43
  6. Step 6: Final answer
    x = 14,940.34

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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.