Home / 13,749.75-18,986.27-8,722.89

Finding the Fourth Proportional to 13,749.75, 18,986.27 and 8,722.89

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Solution

The fourth proportional to 13,749.75, 18,986.27 and 8,722.89 is: 12,044.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.75 : 18,986.27 = 8,722.89 : x
  2. Step 2: Convert to fraction form
    13,749.75/18,986.27 = 8,722.89/x
  3. Step 3: Cross multiply
    13,749.75x = 18,986.27 × 8,722.89
  4. Step 4: Simplify right side
    13,749.75x = 165,615,101.11
  5. Step 5: Solve for x
    x = 165,615,101.11/13,749.75
  6. Step 6: Final answer
    x = 12,044.95

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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.