Home / 13,518.39-18,664.60-8,749.87

Finding the Fourth Proportional to 13,518.39, 18,664.60 and 8,749.87

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Solution

The fourth proportional to 13,518.39, 18,664.60 and 8,749.87 is: 12,080.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.39 : 18,664.60 = 8,749.87 : x
  2. Step 2: Convert to fraction form
    13,518.39/18,664.60 = 8,749.87/x
  3. Step 3: Cross multiply
    13,518.39x = 18,664.60 × 8,749.87
  4. Step 4: Simplify right side
    13,518.39x = 163,312,806.33
  5. Step 5: Solve for x
    x = 163,312,806.33/13,518.39
  6. Step 6: Final answer
    x = 12,080.79

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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.