Home / 13,724.92-20,587.38-5,515

Finding the Fourth Proportional to 13,724.92, 20,587.38 and 5,515

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Solution

The fourth proportional to 13,724.92, 20,587.38 and 5,515 is: 8,272.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.92 : 20,587.38 = 5,515 : x
  2. Step 2: Convert to fraction form
    13,724.92/20,587.38 = 5,515/x
  3. Step 3: Cross multiply
    13,724.92x = 20,587.38 × 5,515
  4. Step 4: Simplify right side
    13,724.92x = 113,539,400.70
  5. Step 5: Solve for x
    x = 113,539,400.70/13,724.92
  6. Step 6: Final answer
    x = 8,272.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.