Home / 15,724.54-21,705.20-9,759.70

Finding the Fourth Proportional to 15,724.54, 21,705.20 and 9,759.70

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Solution

The fourth proportional to 15,724.54, 21,705.20 and 9,759.70 is: 13,471.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.54 : 21,705.20 = 9,759.70 : x
  2. Step 2: Convert to fraction form
    15,724.54/21,705.20 = 9,759.70/x
  3. Step 3: Cross multiply
    15,724.54x = 21,705.20 × 9,759.70
  4. Step 4: Simplify right side
    15,724.54x = 211,836,240.44
  5. Step 5: Solve for x
    x = 211,836,240.44/15,724.54
  6. Step 6: Final answer
    x = 13,471.70

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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.