Home / 13,415.37-18,504.79-8,641.50

Finding the Fourth Proportional to 13,415.37, 18,504.79 and 8,641.50

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Solution

The fourth proportional to 13,415.37, 18,504.79 and 8,641.50 is: 11,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.37 : 18,504.79 = 8,641.50 : x
  2. Step 2: Convert to fraction form
    13,415.37/18,504.79 = 8,641.50/x
  3. Step 3: Cross multiply
    13,415.37x = 18,504.79 × 8,641.50
  4. Step 4: Simplify right side
    13,415.37x = 159,909,142.79
  5. Step 5: Solve for x
    x = 159,909,142.79/13,415.37
  6. Step 6: Final answer
    x = 11,919.85

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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.