Home / 12,485.30-18,749.55-8,122.10

Finding the Fourth Proportional to 12,485.30, 18,749.55 and 8,122.10

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Solution

The fourth proportional to 12,485.30, 18,749.55 and 8,122.10 is: 12,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.30 : 18,749.55 = 8,122.10 : x
  2. Step 2: Convert to fraction form
    12,485.30/18,749.55 = 8,122.10/x
  3. Step 3: Cross multiply
    12,485.30x = 18,749.55 × 8,122.10
  4. Step 4: Simplify right side
    12,485.30x = 152,285,720.06
  5. Step 5: Solve for x
    x = 152,285,720.06/12,485.30
  6. Step 6: Final answer
    x = 12,197.20

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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.