Home / 13,749.78-18,970.35-8,082.72

Finding the Fourth Proportional to 13,749.78, 18,970.35 and 8,082.72

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Solution

The fourth proportional to 13,749.78, 18,970.35 and 8,082.72 is: 11,151.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.78 : 18,970.35 = 8,082.72 : x
  2. Step 2: Convert to fraction form
    13,749.78/18,970.35 = 8,082.72/x
  3. Step 3: Cross multiply
    13,749.78x = 18,970.35 × 8,082.72
  4. Step 4: Simplify right side
    13,749.78x = 153,332,027.35
  5. Step 5: Solve for x
    x = 153,332,027.35/13,749.78
  6. Step 6: Final answer
    x = 11,151.60

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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.