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Finding the Fourth Proportional to 12,501.40, 18,749.40 and 5,481.40

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Solution

The fourth proportional to 12,501.40, 18,749.40 and 5,481.40 is: 8,220.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,501.40 : 18,749.40 = 5,481.40 : x
  2. Step 2: Convert to fraction form
    12,501.40/18,749.40 = 5,481.40/x
  3. Step 3: Cross multiply
    12,501.40x = 18,749.40 × 5,481.40
  4. Step 4: Simplify right side
    12,501.40x = 102,772,961.16
  5. Step 5: Solve for x
    x = 102,772,961.16/12,501.40
  6. Step 6: Final answer
    x = 8,220.92

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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.